/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-fun.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9b7772ad7705253c1305067fc38dc9bc7271fbe3-9b7772a [2021-04-15 05:02:18,481 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-15 05:02:18,484 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-15 05:02:18,526 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-04-15 05:02:18,548 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-04-15 05:02:18,550 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-04-15 05:02:18,551 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-04-15 05:02:18,552 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-04-15 05:02:18,555 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-04-15 05:02:18,556 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-04-15 05:02:18,559 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-04-15 05:02:18,563 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-04-15 05:02:18,564 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-04-15 05:02:18,565 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-04-15 05:02:18,566 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-04-15 05:02:18,568 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-04-15 05:02:18,573 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-04-15 05:02:18,581 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-04-15 05:02:18,581 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-04-15 05:02:18,582 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-04-15 05:02:18,585 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 [2021-04-15 05:02:18,618 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-15 05:02:18,618 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-15 05:02:18,618 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-04-15 05:02:18,619 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-04-15 05:02:18,621 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-04-15 05:02:18,622 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-04-15 05:02:18,622 INFO L138 SettingsManager]: * Use SBE=true [2021-04-15 05:02:18,622 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-15 05:02:18,622 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-15 05:02:18,622 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-15 05:02:18,623 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-15 05:02:18,623 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-15 05:02:18,623 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-15 05:02:18,623 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-15 05:02:18,623 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-15 05:02:18,623 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-15 05:02:18,624 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-15 05:02:18,624 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-15 05:02:18,624 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-15 05:02:18,624 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-15 05:02:18,624 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-15 05:02:18,624 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-15 05:02:18,624 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-15 05:02:18,624 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-15 05:02:18,625 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-15 05:02:18,625 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-04-15 05:02:18,625 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-04-15 05:02:18,625 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-04-15 05:02:18,625 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-04-15 05:02:18,625 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-04-15 05:02:18,625 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-15 05:02:18,625 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-15 05:02:18,938 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-15 05:02:18,956 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-15 05:02:18,958 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-15 05:02:18,959 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-04-15 05:02:18,961 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-04-15 05:02:18,962 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-fun.wvr.bpl [2021-04-15 05:02:18,962 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-fun.wvr.bpl' [2021-04-15 05:02:19,252 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-15 05:02:19,254 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-15 05:02:19,255 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-04-15 05:02:19,255 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-04-15 05:02:19,255 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-04-15 05:02:19,266 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:02:19" (1/1) ... [2021-04-15 05:02:19,274 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:02:19" (1/1) ... [2021-04-15 05:02:19,280 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-04-15 05:02:19,281 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-15 05:02:19,282 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-15 05:02:19,283 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-15 05:02:19,288 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:02:19" (1/1) ... [2021-04-15 05:02:19,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:02:19" (1/1) ... [2021-04-15 05:02:19,289 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:02:19" (1/1) ... [2021-04-15 05:02:19,289 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:02:19" (1/1) ... [2021-04-15 05:02:19,291 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:02:19" (1/1) ... [2021-04-15 05:02:19,294 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:02:19" (1/1) ... [2021-04-15 05:02:19,295 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:02:19" (1/1) ... [2021-04-15 05:02:19,295 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-15 05:02:19,296 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-15 05:02:19,296 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-15 05:02:19,296 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-15 05:02:19,301 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:02:19" (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 [2021-04-15 05:02:19,384 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-04-15 05:02:19,384 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-04-15 05:02:19,384 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-04-15 05:02:19,384 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-04-15 05:02:19,385 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-04-15 05:02:19,385 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-04-15 05:02:19,385 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-04-15 05:02:19,385 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-15 05:02:19,385 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-15 05:02:19,385 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-04-15 05:02:19,385 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-04-15 05:02:19,386 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-04-15 05:02:19,388 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-04-15 05:02:19,628 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-15 05:02:19,628 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-04-15 05:02:19,630 INFO L202 PluginConnector]: Adding new model max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 05:02:19 BoogieIcfgContainer [2021-04-15 05:02:19,630 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-15 05:02:19,631 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-15 05:02:19,631 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-15 05:02:19,634 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-15 05:02:19,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:02:19" (1/2) ... [2021-04-15 05:02:19,635 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ee87db7 and model type max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 05:02:19, skipping insertion in model container [2021-04-15 05:02:19,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 05:02:19" (2/2) ... [2021-04-15 05:02:19,636 INFO L111 eAbstractionObserver]: Analyzing ICFG max-fun.wvr.bpl [2021-04-15 05:02:19,640 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-04-15 05:02:19,641 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-04-15 05:02:19,644 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-15 05:02:19,644 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-04-15 05:02:19,676 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-04-15 05:02:19,690 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-04-15 05:02:19,724 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-15 05:02:19,724 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-15 05:02:19,724 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-04-15 05:02:19,724 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-15 05:02:19,724 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-15 05:02:19,724 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-15 05:02:19,725 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-15 05:02:19,725 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-15 05:02:19,731 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-04-15 05:02:19,783 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:19,785 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:19,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 05:02:19,792 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:02:19,792 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:02:19,793 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:02:19,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:02:19,797 INFO L82 PathProgramCache]: Analyzing trace with hash -986458276, now seen corresponding path program 1 times [2021-04-15 05:02:19,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:02:19,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638298934] [2021-04-15 05:02:19,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:02:19,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:02:19,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:19,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638298934] [2021-04-15 05:02:19,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 05:02:19,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-15 05:02:19,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420685033] [2021-04-15 05:02:19,988 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-15 05:02:19,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:02:20,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-15 05:02:20,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 05:02:20,008 INFO L87 Difference]: Start difference. First operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:20,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:02:20,060 INFO L93 Difference]: Finished difference Result 217 states and 617 transitions. [2021-04-15 05:02:20,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-15 05:02:20,062 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 05:02:20,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:02:20,075 INFO L225 Difference]: With dead ends: 217 [2021-04-15 05:02:20,076 INFO L226 Difference]: Without dead ends: 202 [2021-04-15 05:02:20,077 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 05:02:20,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-04-15 05:02:20,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2021-04-15 05:02:20,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.831081081081081) internal successors, (419), 148 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:20,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 419 transitions. [2021-04-15 05:02:20,119 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 419 transitions. Word has length 18 [2021-04-15 05:02:20,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:02:20,120 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 419 transitions. [2021-04-15 05:02:20,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:20,120 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 419 transitions. [2021-04-15 05:02:20,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 05:02:20,122 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:02:20,122 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:02:20,123 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-15 05:02:20,123 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:02:20,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:02:20,124 INFO L82 PathProgramCache]: Analyzing trace with hash -433058596, now seen corresponding path program 1 times [2021-04-15 05:02:20,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:02:20,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093472196] [2021-04-15 05:02:20,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:02:20,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:02:20,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:02:20,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093472196] [2021-04-15 05:02:20,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 05:02:20,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-04-15 05:02:20,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118543890] [2021-04-15 05:02:20,164 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 05:02:20,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:02:20,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 05:02:20,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 05:02:20,165 INFO L87 Difference]: Start difference. First operand 149 states and 419 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:20,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:02:20,197 INFO L93 Difference]: Finished difference Result 158 states and 445 transitions. [2021-04-15 05:02:20,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-04-15 05:02:20,198 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 05:02:20,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:02:20,199 INFO L225 Difference]: With dead ends: 158 [2021-04-15 05:02:20,199 INFO L226 Difference]: Without dead ends: 158 [2021-04-15 05:02:20,200 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-04-15 05:02:20,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-04-15 05:02:20,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2021-04-15 05:02:20,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8333333333333335) internal successors, (374), 132 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:20,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-04-15 05:02:20,213 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 20 [2021-04-15 05:02:20,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:02:20,214 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-04-15 05:02:20,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:20,214 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-04-15 05:02:20,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 05:02:20,215 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:02:20,215 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:02:20,215 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-04-15 05:02:20,216 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:02:20,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:02:20,216 INFO L82 PathProgramCache]: Analyzing trace with hash 275548602, now seen corresponding path program 1 times [2021-04-15 05:02:20,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:02:20,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787453711] [2021-04-15 05:02:20,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:02:20,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:02:20,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:02:20,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787453711] [2021-04-15 05:02:20,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 05:02:20,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-04-15 05:02:20,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636313596] [2021-04-15 05:02:20,254 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 05:02:20,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:02:20,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 05:02:20,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-04-15 05:02:20,255 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:20,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:02:20,292 INFO L93 Difference]: Finished difference Result 183 states and 522 transitions. [2021-04-15 05:02:20,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 05:02:20,292 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 05:02:20,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:02:20,294 INFO L225 Difference]: With dead ends: 183 [2021-04-15 05:02:20,294 INFO L226 Difference]: Without dead ends: 183 [2021-04-15 05:02:20,294 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-04-15 05:02:20,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-04-15 05:02:20,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2021-04-15 05:02:20,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8535031847133756) internal successors, (448), 157 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:20,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-04-15 05:02:20,305 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-04-15 05:02:20,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:02:20,305 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-04-15 05:02:20,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:20,306 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-04-15 05:02:20,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 05:02:20,307 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:02:20,307 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:02:20,307 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-04-15 05:02:20,307 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:02:20,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:02:20,308 INFO L82 PathProgramCache]: Analyzing trace with hash -483303622, now seen corresponding path program 1 times [2021-04-15 05:02:20,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:02:20,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774576491] [2021-04-15 05:02:20,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:02:20,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:02:20,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:20,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774576491] [2021-04-15 05:02:20,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403623321] [2021-04-15 05:02:20,648 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 [2021-04-15 05:02:20,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:02:20,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 05:02:20,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:02:20,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-04-15 05:02:20,991 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:02:20,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-04-15 05:02:20,997 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:02:21,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-04-15 05:02:21,005 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:02:21,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:02:21,024 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 05:02:21,025 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:103, output treesize:21 [2021-04-15 05:02:21,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:21,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:02:21,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-04-15 05:02:21,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713427422] [2021-04-15 05:02:21,076 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 05:02:21,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:02:21,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 05:02:21,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-04-15 05:02:21,081 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:21,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:02:21,343 INFO L93 Difference]: Finished difference Result 330 states and 935 transitions. [2021-04-15 05:02:21,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 05:02:21,343 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 05:02:21,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:02:21,345 INFO L225 Difference]: With dead ends: 330 [2021-04-15 05:02:21,345 INFO L226 Difference]: Without dead ends: 315 [2021-04-15 05:02:21,346 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 442.1ms TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:02:21,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-04-15 05:02:21,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 224. [2021-04-15 05:02:21,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.8699551569506725) internal successors, (640), 223 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:21,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-04-15 05:02:21,357 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-04-15 05:02:21,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:02:21,357 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-04-15 05:02:21,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:21,358 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-04-15 05:02:21,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 05:02:21,359 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:02:21,359 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:02:21,577 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:02:21,577 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:02:21,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:02:21,578 INFO L82 PathProgramCache]: Analyzing trace with hash -651112714, now seen corresponding path program 2 times [2021-04-15 05:02:21,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:02:21,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55784403] [2021-04-15 05:02:21,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:02:21,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:02:21,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:21,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55784403] [2021-04-15 05:02:21,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842833527] [2021-04-15 05:02:21,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 05:02:21,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:02:21,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:02:21,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 05:02:21,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:02:22,174 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:02:22,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-04-15 05:02:22,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:02:22,191 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:02:22,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-04-15 05:02:22,194 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:02:22,214 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:02:22,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 21 [2021-04-15 05:02:22,220 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:02:22,230 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:02:22,231 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 15 [2021-04-15 05:02:22,244 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:02:22,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:02:22,332 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-04-15 05:02:22,332 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:125, output treesize:83 [2021-04-15 05:02:22,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:22,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:02:22,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-04-15 05:02:22,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104023140] [2021-04-15 05:02:22,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 05:02:22,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:02:22,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 05:02:22,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-04-15 05:02:22,460 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:22,893 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-04-15 05:02:23,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:02:23,058 INFO L93 Difference]: Finished difference Result 374 states and 1077 transitions. [2021-04-15 05:02:23,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 05:02:23,059 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 05:02:23,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:02:23,061 INFO L225 Difference]: With dead ends: 374 [2021-04-15 05:02:23,061 INFO L226 Difference]: Without dead ends: 359 [2021-04-15 05:02:23,061 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 756.3ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:02:23,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-04-15 05:02:23,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 229. [2021-04-15 05:02:23,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.912280701754386) internal successors, (664), 228 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:23,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-04-15 05:02:23,070 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-04-15 05:02:23,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:02:23,071 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-04-15 05:02:23,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:23,071 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-04-15 05:02:23,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 05:02:23,072 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:02:23,072 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:02:23,284 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:02:23,285 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:02:23,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:02:23,286 INFO L82 PathProgramCache]: Analyzing trace with hash -352339266, now seen corresponding path program 3 times [2021-04-15 05:02:23,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:02:23,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172151528] [2021-04-15 05:02:23,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:02:23,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:02:23,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:23,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172151528] [2021-04-15 05:02:23,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987043446] [2021-04-15 05:02:23,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 05:02:23,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-04-15 05:02:23,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:02:23,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 05:02:23,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:02:23,709 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 05:02:23,710 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:02:23,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-04-15 05:02:23,715 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:02:23,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-04-15 05:02:23,720 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:02:23,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-04-15 05:02:23,724 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:02:23,727 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 16 treesize of output 10 [2021-04-15 05:02:23,728 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:02:23,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-04-15 05:02:23,741 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:02:23,764 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-04-15 05:02:23,767 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 05:02:23,767 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:145, output treesize:21 [2021-04-15 05:02:23,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:23,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:02:23,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-04-15 05:02:23,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871720767] [2021-04-15 05:02:23,831 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 05:02:23,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:02:23,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 05:02:23,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-04-15 05:02:23,832 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:24,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:02:24,030 INFO L93 Difference]: Finished difference Result 296 states and 831 transitions. [2021-04-15 05:02:24,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 05:02:24,031 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 05:02:24,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:02:24,033 INFO L225 Difference]: With dead ends: 296 [2021-04-15 05:02:24,033 INFO L226 Difference]: Without dead ends: 281 [2021-04-15 05:02:24,033 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 309.7ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-04-15 05:02:24,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-04-15 05:02:24,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 241. [2021-04-15 05:02:24,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8916666666666666) internal successors, (694), 240 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:24,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-04-15 05:02:24,043 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-04-15 05:02:24,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:02:24,043 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-04-15 05:02:24,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:24,043 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-04-15 05:02:24,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 05:02:24,044 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:02:24,044 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:02:24,252 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-04-15 05:02:24,253 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:02:24,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:02:24,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1218486334, now seen corresponding path program 4 times [2021-04-15 05:02:24,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:02:24,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66947439] [2021-04-15 05:02:24,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:02:24,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:02:24,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:24,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66947439] [2021-04-15 05:02:24,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434986015] [2021-04-15 05:02:24,507 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 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 [2021-04-15 05:02:24,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:02:24,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:02:24,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 05:02:24,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:02:24,792 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:02:24,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 15 [2021-04-15 05:02:24,799 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:02:24,808 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:02:24,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-04-15 05:02:24,810 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:02:24,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:02:24,879 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:02:24,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 21 [2021-04-15 05:02:24,881 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:02:24,890 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:02:24,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-04-15 05:02:24,893 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:02:24,948 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:02:24,955 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-04-15 05:02:24,955 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:83 [2021-04-15 05:02:25,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:25,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:02:25,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-04-15 05:02:25,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241955700] [2021-04-15 05:02:25,097 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:02:25,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:02:25,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:02:25,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:02:25,098 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:25,376 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-04-15 05:02:25,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:02:25,503 INFO L93 Difference]: Finished difference Result 425 states and 1233 transitions. [2021-04-15 05:02:25,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 05:02:25,504 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 05:02:25,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:02:25,507 INFO L225 Difference]: With dead ends: 425 [2021-04-15 05:02:25,507 INFO L226 Difference]: Without dead ends: 410 [2021-04-15 05:02:25,507 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 566.2ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:02:25,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-04-15 05:02:25,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 247. [2021-04-15 05:02:25,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9186991869918697) internal successors, (718), 246 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:25,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-04-15 05:02:25,515 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-04-15 05:02:25,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:02:25,521 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-04-15 05:02:25,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:25,521 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-04-15 05:02:25,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:02:25,522 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:02:25,522 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:02:25,738 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:02:25,738 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:02:25,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:02:25,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1613936552, now seen corresponding path program 5 times [2021-04-15 05:02:25,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:02:25,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491153166] [2021-04-15 05:02:25,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:02:25,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:02:25,814 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:25,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491153166] [2021-04-15 05:02:25,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817628290] [2021-04-15 05:02:25,814 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 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 [2021-04-15 05:02:25,866 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 05:02:25,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:02:25,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:02:25,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:02:25,951 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:25,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:02:25,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-04-15 05:02:25,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491862756] [2021-04-15 05:02:25,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 05:02:25,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:02:25,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 05:02:25,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-04-15 05:02:25,953 INFO L87 Difference]: Start difference. First operand 247 states and 718 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:26,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:02:26,369 INFO L93 Difference]: Finished difference Result 619 states and 1783 transitions. [2021-04-15 05:02:26,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 05:02:26,370 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:02:26,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:02:26,374 INFO L225 Difference]: With dead ends: 619 [2021-04-15 05:02:26,375 INFO L226 Difference]: Without dead ends: 619 [2021-04-15 05:02:26,375 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 242.8ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-04-15 05:02:26,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-04-15 05:02:26,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-04-15 05:02:26,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.050675675675676) internal successors, (903), 296 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:26,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-04-15 05:02:26,386 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-04-15 05:02:26,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:02:26,387 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-04-15 05:02:26,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:26,387 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-04-15 05:02:26,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:02:26,389 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:02:26,389 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:02:26,600 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-04-15 05:02:26,601 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:02:26,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:02:26,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1704711900, now seen corresponding path program 6 times [2021-04-15 05:02:26,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:02:26,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886517282] [2021-04-15 05:02:26,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:02:26,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:02:26,649 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:26,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886517282] [2021-04-15 05:02:26,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372753499] [2021-04-15 05:02:26,650 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 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 [2021-04-15 05:02:26,673 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 05:02:26,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:02:26,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:02:26,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:02:26,777 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:26,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:02:26,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-04-15 05:02:26,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935117886] [2021-04-15 05:02:26,778 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:02:26,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:02:26,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:02:26,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:02:26,779 INFO L87 Difference]: Start difference. First operand 297 states and 903 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-04-15 05:02:27,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:02:27,562 INFO L93 Difference]: Finished difference Result 1078 states and 2992 transitions. [2021-04-15 05:02:27,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-04-15 05:02:27,562 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 24 [2021-04-15 05:02:27,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:02:27,567 INFO L225 Difference]: With dead ends: 1078 [2021-04-15 05:02:27,567 INFO L226 Difference]: Without dead ends: 1078 [2021-04-15 05:02:27,568 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 499.1ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 05:02:27,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-04-15 05:02:27,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-04-15 05:02:27,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.083056478405316) internal successors, (928), 301 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:27,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-04-15 05:02:27,581 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-04-15 05:02:27,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:02:27,581 INFO L480 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-04-15 05:02:27,581 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-04-15 05:02:27,581 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-04-15 05:02:27,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:02:27,582 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:02:27,582 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:02:27,804 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:02:27,804 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:02:27,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:02:27,805 INFO L82 PathProgramCache]: Analyzing trace with hash -2023303316, now seen corresponding path program 7 times [2021-04-15 05:02:27,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:02:27,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114097160] [2021-04-15 05:02:27,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:02:27,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:02:27,864 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:27,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114097160] [2021-04-15 05:02:27,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383071933] [2021-04-15 05:02:27,864 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 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 [2021-04-15 05:02:27,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:02:27,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:02:27,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:02:27,983 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:27,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:02:27,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-04-15 05:02:27,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35316953] [2021-04-15 05:02:27,984 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:02:27,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:02:27,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:02:27,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:02:27,985 INFO L87 Difference]: Start difference. First operand 302 states and 928 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-04-15 05:02:28,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:02:28,667 INFO L93 Difference]: Finished difference Result 951 states and 2692 transitions. [2021-04-15 05:02:28,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-04-15 05:02:28,667 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 24 [2021-04-15 05:02:28,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:02:28,674 INFO L225 Difference]: With dead ends: 951 [2021-04-15 05:02:28,674 INFO L226 Difference]: Without dead ends: 951 [2021-04-15 05:02:28,674 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 418.0ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-04-15 05:02:28,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-04-15 05:02:28,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-04-15 05:02:28,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 3.0616438356164384) internal successors, (894), 292 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:28,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-04-15 05:02:28,694 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-04-15 05:02:28,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:02:28,694 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-04-15 05:02:28,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-04-15 05:02:28,694 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-04-15 05:02:28,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:02:28,695 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:02:28,695 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:02:28,909 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:02:28,909 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:02:28,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:02:28,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1087164644, now seen corresponding path program 1 times [2021-04-15 05:02:28,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:02:28,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040106974] [2021-04-15 05:02:28,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:02:28,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:02:28,958 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:02:28,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040106974] [2021-04-15 05:02:28,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550860574] [2021-04-15 05:02:28,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:02:28,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:02:28,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-04-15 05:02:28,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:02:29,039 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:02:29,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:02:29,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-04-15 05:02:29,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689744151] [2021-04-15 05:02:29,040 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 05:02:29,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:02:29,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 05:02:29,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-04-15 05:02:29,040 INFO L87 Difference]: Start difference. First operand 293 states and 894 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:29,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:02:29,174 INFO L93 Difference]: Finished difference Result 669 states and 1943 transitions. [2021-04-15 05:02:29,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 05:02:29,175 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:02:29,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:02:29,178 INFO L225 Difference]: With dead ends: 669 [2021-04-15 05:02:29,178 INFO L226 Difference]: Without dead ends: 663 [2021-04-15 05:02:29,178 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 70.1ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:02:29,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-04-15 05:02:29,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-04-15 05:02:29,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.1699029126213594) internal successors, (1306), 412 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:29,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-04-15 05:02:29,190 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-04-15 05:02:29,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:02:29,191 INFO L480 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-04-15 05:02:29,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:29,191 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-04-15 05:02:29,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:02:29,193 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:02:29,193 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:02:29,415 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-04-15 05:02:29,415 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:02:29,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:02:29,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1524133352, now seen corresponding path program 8 times [2021-04-15 05:02:29,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:02:29,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263786702] [2021-04-15 05:02:29,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:02:29,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:02:29,459 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:29,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263786702] [2021-04-15 05:02:29,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734222949] [2021-04-15 05:02:29,459 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 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 [2021-04-15 05:02:29,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:02:29,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:02:29,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:02:29,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:02:29,580 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:29,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:02:29,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-04-15 05:02:29,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496490786] [2021-04-15 05:02:29,581 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:02:29,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:02:29,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:02:29,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:02:29,582 INFO L87 Difference]: Start difference. First operand 413 states and 1306 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:29,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:02:29,776 INFO L93 Difference]: Finished difference Result 710 states and 2124 transitions. [2021-04-15 05:02:29,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 05:02:29,777 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:02:29,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:02:29,779 INFO L225 Difference]: With dead ends: 710 [2021-04-15 05:02:29,780 INFO L226 Difference]: Without dead ends: 672 [2021-04-15 05:02:29,780 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 150.4ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-04-15 05:02:29,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-04-15 05:02:29,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-04-15 05:02:29,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 3.17704280155642) internal successors, (1633), 514 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:29,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-04-15 05:02:29,793 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-04-15 05:02:29,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:02:29,793 INFO L480 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-04-15 05:02:29,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:29,793 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-04-15 05:02:29,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:02:29,795 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:02:29,795 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:02:30,009 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:02:30,009 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:02:30,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:02:30,009 INFO L82 PathProgramCache]: Analyzing trace with hash 2064876612, now seen corresponding path program 2 times [2021-04-15 05:02:30,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:02:30,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251524728] [2021-04-15 05:02:30,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:02:30,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:02:30,048 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:02:30,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251524728] [2021-04-15 05:02:30,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641332795] [2021-04-15 05:02:30,048 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 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 [2021-04-15 05:02:30,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:02:30,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:02:30,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-04-15 05:02:30,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:02:30,133 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:02:30,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:02:30,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-04-15 05:02:30,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627638332] [2021-04-15 05:02:30,134 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 05:02:30,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:02:30,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 05:02:30,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-04-15 05:02:30,135 INFO L87 Difference]: Start difference. First operand 515 states and 1633 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:30,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:02:30,249 INFO L93 Difference]: Finished difference Result 830 states and 2453 transitions. [2021-04-15 05:02:30,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 05:02:30,253 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:02:30,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:02:30,257 INFO L225 Difference]: With dead ends: 830 [2021-04-15 05:02:30,257 INFO L226 Difference]: Without dead ends: 830 [2021-04-15 05:02:30,257 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 70.9ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:02:30,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-04-15 05:02:30,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-04-15 05:02:30,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 3.153119092627599) internal successors, (1668), 529 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:30,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-04-15 05:02:30,275 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-04-15 05:02:30,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:02:30,275 INFO L480 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-04-15 05:02:30,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:30,276 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-04-15 05:02:30,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:02:30,277 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:02:30,277 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:02:30,497 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-04-15 05:02:30,497 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:02:30,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:02:30,498 INFO L82 PathProgramCache]: Analyzing trace with hash 718195046, now seen corresponding path program 9 times [2021-04-15 05:02:30,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:02:30,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480110014] [2021-04-15 05:02:30,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:02:30,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:02:30,565 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:30,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480110014] [2021-04-15 05:02:30,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976375718] [2021-04-15 05:02:30,566 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 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 [2021-04-15 05:02:30,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 05:02:30,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:02:30,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:02:30,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:02:30,659 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:30,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:02:30,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-04-15 05:02:30,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358797312] [2021-04-15 05:02:30,660 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 05:02:30,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:02:30,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 05:02:30,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-04-15 05:02:30,661 INFO L87 Difference]: Start difference. First operand 530 states and 1668 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:30,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:02:30,982 INFO L93 Difference]: Finished difference Result 1196 states and 3492 transitions. [2021-04-15 05:02:30,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 05:02:30,982 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:02:30,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:02:30,989 INFO L225 Difference]: With dead ends: 1196 [2021-04-15 05:02:30,989 INFO L226 Difference]: Without dead ends: 1196 [2021-04-15 05:02:30,989 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 201.6ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-04-15 05:02:30,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-04-15 05:02:31,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-04-15 05:02:31,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 3.1497227356746764) internal successors, (1704), 541 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:31,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-04-15 05:02:31,010 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-04-15 05:02:31,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:02:31,010 INFO L480 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-04-15 05:02:31,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:31,011 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-04-15 05:02:31,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:02:31,012 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:02:31,012 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:02:31,236 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-04-15 05:02:31,236 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:02:31,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:02:31,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1503109140, now seen corresponding path program 10 times [2021-04-15 05:02:31,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:02:31,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546895049] [2021-04-15 05:02:31,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:02:31,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:02:31,282 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:31,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546895049] [2021-04-15 05:02:31,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837257610] [2021-04-15 05:02:31,283 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 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 [2021-04-15 05:02:31,303 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:02:31,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:02:31,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:02:31,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:02:31,384 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:31,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:02:31,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-04-15 05:02:31,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175311044] [2021-04-15 05:02:31,385 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 05:02:31,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:02:31,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 05:02:31,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-04-15 05:02:31,386 INFO L87 Difference]: Start difference. First operand 542 states and 1704 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:31,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:02:31,835 INFO L93 Difference]: Finished difference Result 1492 states and 4245 transitions. [2021-04-15 05:02:31,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-04-15 05:02:31,835 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:02:31,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:02:31,841 INFO L225 Difference]: With dead ends: 1492 [2021-04-15 05:02:31,842 INFO L226 Difference]: Without dead ends: 1492 [2021-04-15 05:02:31,842 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 283.4ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 05:02:31,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-04-15 05:02:31,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-04-15 05:02:31,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 3.1555555555555554) internal successors, (1846), 585 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:31,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-04-15 05:02:31,866 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-04-15 05:02:31,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:02:31,866 INFO L480 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-04-15 05:02:31,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:31,866 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-04-15 05:02:31,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:02:31,868 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:02:31,868 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:02:32,084 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-04-15 05:02:32,085 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:02:32,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:02:32,086 INFO L82 PathProgramCache]: Analyzing trace with hash 420086484, now seen corresponding path program 11 times [2021-04-15 05:02:32,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:02:32,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598752291] [2021-04-15 05:02:32,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:02:32,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:02:32,127 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:32,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598752291] [2021-04-15 05:02:32,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049291922] [2021-04-15 05:02:32,128 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 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 [2021-04-15 05:02:32,148 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:02:32,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:02:32,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:02:32,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:02:32,246 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:32,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:02:32,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-04-15 05:02:32,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326309085] [2021-04-15 05:02:32,249 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:02:32,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:02:32,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:02:32,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:02:32,249 INFO L87 Difference]: Start difference. First operand 586 states and 1846 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:32,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:02:32,517 INFO L93 Difference]: Finished difference Result 1258 states and 3765 transitions. [2021-04-15 05:02:32,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 05:02:32,518 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:02:32,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:02:32,522 INFO L225 Difference]: With dead ends: 1258 [2021-04-15 05:02:32,522 INFO L226 Difference]: Without dead ends: 1248 [2021-04-15 05:02:32,522 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 166.7ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-04-15 05:02:32,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-04-15 05:02:32,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-04-15 05:02:32,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.224570673712021) internal successors, (2441), 757 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:32,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-04-15 05:02:32,545 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-04-15 05:02:32,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:02:32,545 INFO L480 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-04-15 05:02:32,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:32,545 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-04-15 05:02:32,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:02:32,547 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:02:32,547 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:02:32,760 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-04-15 05:02:32,761 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:02:32,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:02:32,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1891164602, now seen corresponding path program 12 times [2021-04-15 05:02:32,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:02:32,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313454566] [2021-04-15 05:02:32,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:02:32,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:02:32,798 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:32,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313454566] [2021-04-15 05:02:32,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048501228] [2021-04-15 05:02:32,798 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 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 [2021-04-15 05:02:32,821 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 05:02:32,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:02:32,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:02:32,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:02:32,913 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:32,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:02:32,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-04-15 05:02:32,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653211230] [2021-04-15 05:02:32,914 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:02:32,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:02:32,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:02:32,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:02:32,915 INFO L87 Difference]: Start difference. First operand 758 states and 2441 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:33,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:02:33,194 INFO L93 Difference]: Finished difference Result 1329 states and 4025 transitions. [2021-04-15 05:02:33,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 05:02:33,195 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:02:33,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:02:33,199 INFO L225 Difference]: With dead ends: 1329 [2021-04-15 05:02:33,199 INFO L226 Difference]: Without dead ends: 1329 [2021-04-15 05:02:33,200 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 208.5ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-04-15 05:02:33,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-04-15 05:02:33,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-04-15 05:02:33,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 3.220183486238532) internal successors, (2457), 763 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:33,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-04-15 05:02:33,227 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-04-15 05:02:33,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:02:33,227 INFO L480 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-04-15 05:02:33,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:33,227 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-04-15 05:02:33,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:02:33,229 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:02:33,229 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:02:33,444 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:02:33,445 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:02:33,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:02:33,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1458287998, now seen corresponding path program 13 times [2021-04-15 05:02:33,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:02:33,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756743529] [2021-04-15 05:02:33,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:02:33,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:02:33,494 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:33,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756743529] [2021-04-15 05:02:33,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621086231] [2021-04-15 05:02:33,494 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 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 [2021-04-15 05:02:33,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:02:33,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:02:33,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:02:33,594 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:33,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:02:33,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-04-15 05:02:33,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840579733] [2021-04-15 05:02:33,595 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 05:02:33,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:02:33,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 05:02:33,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-04-15 05:02:33,595 INFO L87 Difference]: Start difference. First operand 764 states and 2457 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:33,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:02:33,952 INFO L93 Difference]: Finished difference Result 1548 states and 4638 transitions. [2021-04-15 05:02:33,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 05:02:33,952 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:02:33,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:02:33,958 INFO L225 Difference]: With dead ends: 1548 [2021-04-15 05:02:33,958 INFO L226 Difference]: Without dead ends: 1544 [2021-04-15 05:02:33,959 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 204.6ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-04-15 05:02:33,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-04-15 05:02:33,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-04-15 05:02:33,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.204928664072633) internal successors, (2471), 771 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:33,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-04-15 05:02:33,989 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-04-15 05:02:33,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:02:33,989 INFO L480 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-04-15 05:02:33,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:33,989 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-04-15 05:02:33,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:02:33,991 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:02:33,992 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:02:34,212 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:02:34,213 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:02:34,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:02:34,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1186278808, now seen corresponding path program 14 times [2021-04-15 05:02:34,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:02:34,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296002437] [2021-04-15 05:02:34,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:02:34,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:02:34,256 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:34,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296002437] [2021-04-15 05:02:34,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539731065] [2021-04-15 05:02:34,257 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 05:02:34,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:02:34,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:02:34,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:02:34,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:02:34,383 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:34,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:02:34,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-04-15 05:02:34,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138742270] [2021-04-15 05:02:34,385 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:02:34,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:02:34,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:02:34,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:02:34,386 INFO L87 Difference]: Start difference. First operand 772 states and 2471 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-04-15 05:02:35,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:02:35,197 INFO L93 Difference]: Finished difference Result 2734 states and 8136 transitions. [2021-04-15 05:02:35,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-04-15 05:02:35,198 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 24 [2021-04-15 05:02:35,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:02:35,210 INFO L225 Difference]: With dead ends: 2734 [2021-04-15 05:02:35,210 INFO L226 Difference]: Without dead ends: 2734 [2021-04-15 05:02:35,211 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 480.2ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 05:02:35,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-04-15 05:02:35,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-04-15 05:02:35,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 3.3107142857142855) internal successors, (2781), 840 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:35,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-04-15 05:02:35,250 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-04-15 05:02:35,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:02:35,250 INFO L480 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-04-15 05:02:35,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-04-15 05:02:35,250 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-04-15 05:02:35,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:02:35,252 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:02:35,252 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:02:35,466 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:02:35,467 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:02:35,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:02:35,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1753230888, now seen corresponding path program 15 times [2021-04-15 05:02:35,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:02:35,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395616433] [2021-04-15 05:02:35,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:02:35,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:02:35,515 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:35,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395616433] [2021-04-15 05:02:35,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635047947] [2021-04-15 05:02:35,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 05:02:35,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 05:02:35,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:02:35,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:02:35,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:02:35,663 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:35,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:02:35,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-04-15 05:02:35,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630198277] [2021-04-15 05:02:35,665 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:02:35,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:02:35,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:02:35,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:02:35,665 INFO L87 Difference]: Start difference. First operand 841 states and 2781 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-04-15 05:02:36,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:02:36,421 INFO L93 Difference]: Finished difference Result 2693 states and 8043 transitions. [2021-04-15 05:02:36,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-04-15 05:02:36,421 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 24 [2021-04-15 05:02:36,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:02:36,429 INFO L225 Difference]: With dead ends: 2693 [2021-04-15 05:02:36,429 INFO L226 Difference]: Without dead ends: 2693 [2021-04-15 05:02:36,430 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 480.3ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 05:02:36,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-04-15 05:02:36,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-04-15 05:02:36,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 3.289156626506024) internal successors, (2730), 830 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:36,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-04-15 05:02:36,464 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-04-15 05:02:36,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:02:36,464 INFO L480 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-04-15 05:02:36,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-04-15 05:02:36,464 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-04-15 05:02:36,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:02:36,466 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:02:36,466 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:02:36,688 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-04-15 05:02:36,688 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:02:36,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:02:36,689 INFO L82 PathProgramCache]: Analyzing trace with hash 580885030, now seen corresponding path program 16 times [2021-04-15 05:02:36,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:02:36,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272243253] [2021-04-15 05:02:36,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:02:36,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:02:36,732 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:36,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272243253] [2021-04-15 05:02:36,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736531383] [2021-04-15 05:02:36,732 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 05:02:36,782 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:02:36,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:02:36,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:02:36,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:02:36,866 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:36,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:02:36,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-04-15 05:02:36,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751381683] [2021-04-15 05:02:36,868 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 05:02:36,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:02:36,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 05:02:36,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-04-15 05:02:36,869 INFO L87 Difference]: Start difference. First operand 831 states and 2730 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:37,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:02:37,491 INFO L93 Difference]: Finished difference Result 2677 states and 7780 transitions. [2021-04-15 05:02:37,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-04-15 05:02:37,492 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:02:37,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:02:37,497 INFO L225 Difference]: With dead ends: 2677 [2021-04-15 05:02:37,497 INFO L226 Difference]: Without dead ends: 2677 [2021-04-15 05:02:37,497 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 394.0ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-04-15 05:02:37,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-04-15 05:02:37,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-04-15 05:02:37,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2997630331753554) internal successors, (2785), 844 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:37,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-04-15 05:02:37,528 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-04-15 05:02:37,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:02:37,528 INFO L480 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-04-15 05:02:37,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:37,528 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-04-15 05:02:37,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:02:37,530 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:02:37,530 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:02:37,745 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-04-15 05:02:37,745 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:02:37,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:02:37,745 INFO L82 PathProgramCache]: Analyzing trace with hash 662261118, now seen corresponding path program 17 times [2021-04-15 05:02:37,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:02:37,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66183925] [2021-04-15 05:02:37,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:02:37,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:02:37,787 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:37,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66183925] [2021-04-15 05:02:37,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491697160] [2021-04-15 05:02:37,787 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 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 [2021-04-15 05:02:37,808 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 05:02:37,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:02:37,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:02:37,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:02:37,881 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:37,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:02:37,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-04-15 05:02:37,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840864184] [2021-04-15 05:02:37,882 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 05:02:37,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:02:37,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 05:02:37,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-04-15 05:02:37,882 INFO L87 Difference]: Start difference. First operand 845 states and 2785 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:38,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:02:38,569 INFO L93 Difference]: Finished difference Result 2474 states and 7308 transitions. [2021-04-15 05:02:38,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-04-15 05:02:38,570 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:02:38,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:02:38,574 INFO L225 Difference]: With dead ends: 2474 [2021-04-15 05:02:38,574 INFO L226 Difference]: Without dead ends: 2470 [2021-04-15 05:02:38,575 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 396.9ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-04-15 05:02:38,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-04-15 05:02:38,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-04-15 05:02:38,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2973933649289098) internal successors, (2783), 844 states have internal predecessors, (2783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:38,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-04-15 05:02:38,604 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-04-15 05:02:38,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:02:38,605 INFO L480 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-04-15 05:02:38,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:38,605 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-04-15 05:02:38,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:02:38,607 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:02:38,607 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:02:38,820 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-04-15 05:02:38,821 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:02:38,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:02:38,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1592918334, now seen corresponding path program 18 times [2021-04-15 05:02:38,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:02:38,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187463387] [2021-04-15 05:02:38,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:02:38,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:02:38,856 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:38,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187463387] [2021-04-15 05:02:38,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163708893] [2021-04-15 05:02:38,856 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 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 [2021-04-15 05:02:38,877 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 05:02:38,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:02:38,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:02:38,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:02:38,964 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:38,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:02:38,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-04-15 05:02:38,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852876715] [2021-04-15 05:02:38,965 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:02:38,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:02:38,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:02:38,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:02:38,966 INFO L87 Difference]: Start difference. First operand 845 states and 2783 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:39,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:02:39,615 INFO L93 Difference]: Finished difference Result 2514 states and 7408 transitions. [2021-04-15 05:02:39,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-04-15 05:02:39,615 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:02:39,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:02:39,622 INFO L225 Difference]: With dead ends: 2514 [2021-04-15 05:02:39,622 INFO L226 Difference]: Without dead ends: 2514 [2021-04-15 05:02:39,622 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 379.8ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-04-15 05:02:39,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-04-15 05:02:39,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-04-15 05:02:39,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.3039906103286385) internal successors, (2815), 852 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:39,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-04-15 05:02:39,653 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-04-15 05:02:39,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:02:39,654 INFO L480 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-04-15 05:02:39,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:39,654 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-04-15 05:02:39,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:02:39,656 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:02:39,656 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:02:39,874 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-04-15 05:02:39,875 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:02:39,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:02:39,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1059009808, now seen corresponding path program 19 times [2021-04-15 05:02:39,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:02:39,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427464120] [2021-04-15 05:02:39,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:02:39,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:02:39,913 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:39,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427464120] [2021-04-15 05:02:39,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471221472] [2021-04-15 05:02:39,914 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 05:02:39,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:02:39,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:02:39,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:02:40,025 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:40,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:02:40,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-04-15 05:02:40,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721000036] [2021-04-15 05:02:40,027 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:02:40,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:02:40,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:02:40,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:02:40,027 INFO L87 Difference]: Start difference. First operand 853 states and 2815 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:40,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:02:40,678 INFO L93 Difference]: Finished difference Result 2332 states and 6984 transitions. [2021-04-15 05:02:40,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-04-15 05:02:40,678 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:02:40,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:02:40,683 INFO L225 Difference]: With dead ends: 2332 [2021-04-15 05:02:40,683 INFO L226 Difference]: Without dead ends: 2328 [2021-04-15 05:02:40,684 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 387.2ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-04-15 05:02:40,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-04-15 05:02:40,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-04-15 05:02:40,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.301643192488263) internal successors, (2813), 852 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:40,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-04-15 05:02:40,712 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-04-15 05:02:40,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:02:40,712 INFO L480 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-04-15 05:02:40,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:40,713 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-04-15 05:02:40,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:02:40,714 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:02:40,715 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:02:40,928 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-04-15 05:02:40,929 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:02:40,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:02:40,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1971295360, now seen corresponding path program 3 times [2021-04-15 05:02:40,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:02:40,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354741105] [2021-04-15 05:02:40,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:02:40,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:02:40,957 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:02:40,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354741105] [2021-04-15 05:02:40,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885485932] [2021-04-15 05:02:40,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:02:40,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-04-15 05:02:40,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:02:40,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-04-15 05:02:40,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:02:41,041 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:02:41,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:02:41,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-04-15 05:02:41,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035817081] [2021-04-15 05:02:41,041 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 05:02:41,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:02:41,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 05:02:41,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-04-15 05:02:41,042 INFO L87 Difference]: Start difference. First operand 853 states and 2813 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:41,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:02:41,121 INFO L93 Difference]: Finished difference Result 929 states and 3034 transitions. [2021-04-15 05:02:41,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 05:02:41,121 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:02:41,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:02:41,126 INFO L225 Difference]: With dead ends: 929 [2021-04-15 05:02:41,126 INFO L226 Difference]: Without dead ends: 929 [2021-04-15 05:02:41,126 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 57.3ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-04-15 05:02:41,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-04-15 05:02:41,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-04-15 05:02:41,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.3029525032092426) internal successors, (2573), 779 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:41,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-04-15 05:02:41,156 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-04-15 05:02:41,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:02:41,156 INFO L480 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-04-15 05:02:41,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:41,156 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-04-15 05:02:41,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:02:41,158 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:02:41,158 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:02:41,376 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:02:41,377 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:02:41,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:02:41,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1041095616, now seen corresponding path program 20 times [2021-04-15 05:02:41,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:02:41,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431135166] [2021-04-15 05:02:41,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:02:41,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:02:41,414 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:41,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431135166] [2021-04-15 05:02:41,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617040567] [2021-04-15 05:02:41,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 05:02:41,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:02:41,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:02:41,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:02:41,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:02:41,494 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:41,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:02:41,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-04-15 05:02:41,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700896176] [2021-04-15 05:02:41,495 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 05:02:41,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:02:41,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 05:02:41,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-04-15 05:02:41,495 INFO L87 Difference]: Start difference. First operand 780 states and 2573 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:41,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:02:41,790 INFO L93 Difference]: Finished difference Result 1555 states and 4761 transitions. [2021-04-15 05:02:41,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 05:02:41,790 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:02:41,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:02:41,793 INFO L225 Difference]: With dead ends: 1555 [2021-04-15 05:02:41,793 INFO L226 Difference]: Without dead ends: 1555 [2021-04-15 05:02:41,794 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 171.7ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-04-15 05:02:41,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-04-15 05:02:41,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-04-15 05:02:41,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.296076099881094) internal successors, (2772), 841 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:41,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-04-15 05:02:41,813 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-04-15 05:02:41,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:02:41,813 INFO L480 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-04-15 05:02:41,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:41,813 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-04-15 05:02:41,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:02:41,815 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:02:41,815 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:02:42,036 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:02:42,036 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:02:42,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:02:42,037 INFO L82 PathProgramCache]: Analyzing trace with hash 861583836, now seen corresponding path program 21 times [2021-04-15 05:02:42,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:02:42,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650666078] [2021-04-15 05:02:42,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:02:42,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:02:42,069 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:42,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650666078] [2021-04-15 05:02:42,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526981445] [2021-04-15 05:02:42,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:02:42,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 05:02:42,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:02:42,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:02:42,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:02:42,150 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:42,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:02:42,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-04-15 05:02:42,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984064765] [2021-04-15 05:02:42,151 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 05:02:42,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:02:42,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 05:02:42,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-04-15 05:02:42,152 INFO L87 Difference]: Start difference. First operand 842 states and 2772 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:42,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:02:42,404 INFO L93 Difference]: Finished difference Result 1605 states and 4891 transitions. [2021-04-15 05:02:42,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 05:02:42,405 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:02:42,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:02:42,407 INFO L225 Difference]: With dead ends: 1605 [2021-04-15 05:02:42,407 INFO L226 Difference]: Without dead ends: 1605 [2021-04-15 05:02:42,408 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 145.7ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-04-15 05:02:42,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-04-15 05:02:42,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-04-15 05:02:42,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.2905027932960893) internal successors, (2945), 895 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:42,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-04-15 05:02:42,425 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-04-15 05:02:42,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:02:42,425 INFO L480 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-04-15 05:02:42,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:42,425 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-04-15 05:02:42,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:02:42,427 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:02:42,427 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:02:42,640 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:02:42,641 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:02:42,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:02:42,641 INFO L82 PathProgramCache]: Analyzing trace with hash 816762694, now seen corresponding path program 22 times [2021-04-15 05:02:42,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:02:42,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564044632] [2021-04-15 05:02:42,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:02:42,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:02:42,690 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:02:42,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564044632] [2021-04-15 05:02:42,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740826883] [2021-04-15 05:02:42,690 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:02:42,709 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:02:42,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:02:42,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:02:42,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:02:42,755 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:02:42,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:02:42,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-04-15 05:02:42,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406119714] [2021-04-15 05:02:42,756 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 05:02:42,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:02:42,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 05:02:42,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-04-15 05:02:42,757 INFO L87 Difference]: Start difference. First operand 896 states and 2945 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:42,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:02:42,971 INFO L93 Difference]: Finished difference Result 1524 states and 4690 transitions. [2021-04-15 05:02:42,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 05:02:42,972 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:02:42,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:02:42,974 INFO L225 Difference]: With dead ends: 1524 [2021-04-15 05:02:42,974 INFO L226 Difference]: Without dead ends: 1520 [2021-04-15 05:02:42,974 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 116.1ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-04-15 05:02:42,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-04-15 05:02:42,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-04-15 05:02:42,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.288268156424581) internal successors, (2943), 895 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:42,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-04-15 05:02:42,993 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-04-15 05:02:42,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:02:42,993 INFO L480 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-04-15 05:02:42,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:42,993 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-04-15 05:02:42,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:02:42,996 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:02:42,996 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:02:43,212 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-04-15 05:02:43,213 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:02:43,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:02:43,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1414099352, now seen corresponding path program 23 times [2021-04-15 05:02:43,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:02:43,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205135623] [2021-04-15 05:02:43,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:02:43,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:02:43,250 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:43,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205135623] [2021-04-15 05:02:43,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385522730] [2021-04-15 05:02:43,251 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:02:43,271 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 05:02:43,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:02:43,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:02:43,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:02:43,328 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:43,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:02:43,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-04-15 05:02:43,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953914866] [2021-04-15 05:02:43,329 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 05:02:43,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:02:43,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 05:02:43,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-04-15 05:02:43,330 INFO L87 Difference]: Start difference. First operand 896 states and 2943 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:43,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:02:43,579 INFO L93 Difference]: Finished difference Result 1508 states and 4652 transitions. [2021-04-15 05:02:43,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 05:02:43,580 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:02:43,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:02:43,582 INFO L225 Difference]: With dead ends: 1508 [2021-04-15 05:02:43,582 INFO L226 Difference]: Without dead ends: 1496 [2021-04-15 05:02:43,582 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 143.1ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-04-15 05:02:43,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-04-15 05:02:43,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-04-15 05:02:43,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 3.276854928017719) internal successors, (2959), 903 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:43,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-04-15 05:02:43,599 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-04-15 05:02:43,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:02:43,599 INFO L480 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-04-15 05:02:43,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:43,599 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-04-15 05:02:43,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:02:43,602 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:02:43,602 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:02:43,823 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:02:43,823 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:02:43,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:02:43,824 INFO L82 PathProgramCache]: Analyzing trace with hash 887679068, now seen corresponding path program 24 times [2021-04-15 05:02:43,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:02:43,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906459595] [2021-04-15 05:02:43,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:02:43,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:02:43,865 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:43,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906459595] [2021-04-15 05:02:43,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391606910] [2021-04-15 05:02:43,866 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:02:43,885 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 05:02:43,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:02:43,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:02:43,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:02:43,966 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:43,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:02:43,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-04-15 05:02:43,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488724944] [2021-04-15 05:02:43,967 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:02:43,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:02:43,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:02:43,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:02:43,968 INFO L87 Difference]: Start difference. First operand 904 states and 2959 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-04-15 05:02:44,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:02:44,456 INFO L93 Difference]: Finished difference Result 2412 states and 7565 transitions. [2021-04-15 05:02:44,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-04-15 05:02:44,456 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 24 [2021-04-15 05:02:44,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:02:44,461 INFO L225 Difference]: With dead ends: 2412 [2021-04-15 05:02:44,461 INFO L226 Difference]: Without dead ends: 2412 [2021-04-15 05:02:44,462 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 335.1ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 05:02:44,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-04-15 05:02:44,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-04-15 05:02:44,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 3.367049009384776) internal successors, (3229), 959 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:44,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-04-15 05:02:44,488 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-04-15 05:02:44,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:02:44,488 INFO L480 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-04-15 05:02:44,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-04-15 05:02:44,488 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-04-15 05:02:44,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:02:44,490 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:02:44,490 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:02:44,713 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-04-15 05:02:44,713 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:02:44,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:02:44,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1454631148, now seen corresponding path program 25 times [2021-04-15 05:02:44,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:02:44,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151627267] [2021-04-15 05:02:44,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:02:44,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:02:44,752 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:44,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151627267] [2021-04-15 05:02:44,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853523413] [2021-04-15 05:02:44,752 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:02:44,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:02:44,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:02:44,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:02:44,890 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:44,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:02:44,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-04-15 05:02:44,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705676295] [2021-04-15 05:02:44,890 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:02:44,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:02:44,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:02:44,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:02:44,891 INFO L87 Difference]: Start difference. First operand 960 states and 3229 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-04-15 05:02:45,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:02:45,345 INFO L93 Difference]: Finished difference Result 2335 states and 7372 transitions. [2021-04-15 05:02:45,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-04-15 05:02:45,346 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 24 [2021-04-15 05:02:45,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:02:45,349 INFO L225 Difference]: With dead ends: 2335 [2021-04-15 05:02:45,349 INFO L226 Difference]: Without dead ends: 2335 [2021-04-15 05:02:45,349 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 306.9ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 05:02:45,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-04-15 05:02:45,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-04-15 05:02:45,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:45,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-04-15 05:02:45,368 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-04-15 05:02:45,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:02:45,369 INFO L480 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-04-15 05:02:45,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-04-15 05:02:45,369 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-04-15 05:02:45,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:02:45,371 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:02:45,371 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:02:45,572 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:02:45,572 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:02:45,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:02:45,573 INFO L82 PathProgramCache]: Analyzing trace with hash 282285290, now seen corresponding path program 26 times [2021-04-15 05:02:45,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:02:45,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655501766] [2021-04-15 05:02:45,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:02:45,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:02:45,623 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:45,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655501766] [2021-04-15 05:02:45,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018932432] [2021-04-15 05:02:45,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:02:45,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:02:45,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:02:45,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:02:45,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:02:45,721 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:45,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:02:45,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-04-15 05:02:45,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917864793] [2021-04-15 05:02:45,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 05:02:45,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:02:45,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 05:02:45,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-04-15 05:02:45,722 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:46,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:02:46,185 INFO L93 Difference]: Finished difference Result 2285 states and 7121 transitions. [2021-04-15 05:02:46,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-04-15 05:02:46,186 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:02:46,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:02:46,189 INFO L225 Difference]: With dead ends: 2285 [2021-04-15 05:02:46,189 INFO L226 Difference]: Without dead ends: 2285 [2021-04-15 05:02:46,190 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 281.6ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 05:02:46,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-04-15 05:02:46,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-04-15 05:02:46,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:46,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-04-15 05:02:46,208 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-04-15 05:02:46,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:02:46,208 INFO L480 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-04-15 05:02:46,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:46,208 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-04-15 05:02:46,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:02:46,210 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:02:46,210 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:02:46,410 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-04-15 05:02:46,410 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:02:46,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:02:46,411 INFO L82 PathProgramCache]: Analyzing trace with hash 363661378, now seen corresponding path program 27 times [2021-04-15 05:02:46,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:02:46,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649756564] [2021-04-15 05:02:46,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:02:46,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:02:46,457 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:46,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649756564] [2021-04-15 05:02:46,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484711490] [2021-04-15 05:02:46,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:02:46,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 05:02:46,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:02:46,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:02:46,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:02:46,552 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:46,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:02:46,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-04-15 05:02:46,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091373818] [2021-04-15 05:02:46,553 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 05:02:46,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:02:46,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 05:02:46,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-04-15 05:02:46,553 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:46,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:02:46,900 INFO L93 Difference]: Finished difference Result 2176 states and 6849 transitions. [2021-04-15 05:02:46,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 05:02:46,901 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:02:46,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:02:46,903 INFO L225 Difference]: With dead ends: 2176 [2021-04-15 05:02:46,903 INFO L226 Difference]: Without dead ends: 2172 [2021-04-15 05:02:46,904 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 219.7ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-04-15 05:02:46,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-04-15 05:02:46,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-04-15 05:02:46,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:46,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-04-15 05:02:46,923 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-04-15 05:02:46,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:02:46,924 INFO L480 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-04-15 05:02:46,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:46,924 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-04-15 05:02:46,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:02:46,926 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:02:46,926 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:02:47,146 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:02:47,146 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:02:47,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:02:47,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1294318594, now seen corresponding path program 28 times [2021-04-15 05:02:47,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:02:47,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541458898] [2021-04-15 05:02:47,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:02:47,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:02:47,183 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:47,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541458898] [2021-04-15 05:02:47,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499339447] [2021-04-15 05:02:47,184 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:02:47,205 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:02:47,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:02:47,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:02:47,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:02:47,295 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:47,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:02:47,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-04-15 05:02:47,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438288645] [2021-04-15 05:02:47,296 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:02:47,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:02:47,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:02:47,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:02:47,297 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:47,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:02:47,695 INFO L93 Difference]: Finished difference Result 2199 states and 6893 transitions. [2021-04-15 05:02:47,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 05:02:47,696 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:02:47,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:02:47,698 INFO L225 Difference]: With dead ends: 2199 [2021-04-15 05:02:47,698 INFO L226 Difference]: Without dead ends: 2199 [2021-04-15 05:02:47,699 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 254.6ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 05:02:47,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-04-15 05:02:47,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-04-15 05:02:47,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:47,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-04-15 05:02:47,717 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-04-15 05:02:47,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:02:47,717 INFO L480 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-04-15 05:02:47,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:47,717 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-04-15 05:02:47,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:02:47,719 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:02:47,719 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:02:47,923 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-04-15 05:02:47,923 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:02:47,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:02:47,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1357609548, now seen corresponding path program 29 times [2021-04-15 05:02:47,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:02:47,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209039648] [2021-04-15 05:02:47,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:02:47,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:02:47,960 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:47,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209039648] [2021-04-15 05:02:47,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376520762] [2021-04-15 05:02:47,960 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:02:47,979 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 05:02:47,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:02:47,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:02:47,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:02:48,060 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:48,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:02:48,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-04-15 05:02:48,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467365303] [2021-04-15 05:02:48,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:02:48,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:02:48,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:02:48,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:02:48,071 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:48,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:02:48,450 INFO L93 Difference]: Finished difference Result 2156 states and 6791 transitions. [2021-04-15 05:02:48,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 05:02:48,450 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:02:48,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:02:48,456 INFO L225 Difference]: With dead ends: 2156 [2021-04-15 05:02:48,456 INFO L226 Difference]: Without dead ends: 2152 [2021-04-15 05:02:48,456 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 249.9ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-04-15 05:02:48,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-04-15 05:02:48,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-04-15 05:02:48,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:48,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-04-15 05:02:48,481 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-04-15 05:02:48,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:02:48,482 INFO L480 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-04-15 05:02:48,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:48,482 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-04-15 05:02:48,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:02:48,484 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:02:48,484 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:02:48,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-04-15 05:02:48,705 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:02:48,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:02:48,705 INFO L82 PathProgramCache]: Analyzing trace with hash -354181564, now seen corresponding path program 30 times [2021-04-15 05:02:48,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:02:48,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763736576] [2021-04-15 05:02:48,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:02:48,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:02:48,740 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:48,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763736576] [2021-04-15 05:02:48,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700507423] [2021-04-15 05:02:48,740 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 05:02:48,760 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 05:02:48,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:02:48,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:02:48,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:02:48,821 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:48,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:02:48,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-04-15 05:02:48,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840689418] [2021-04-15 05:02:48,821 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 05:02:48,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:02:48,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 05:02:48,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-04-15 05:02:48,822 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:49,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:02:49,155 INFO L93 Difference]: Finished difference Result 2097 states and 6377 transitions. [2021-04-15 05:02:49,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 05:02:49,156 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:02:49,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:02:49,158 INFO L225 Difference]: With dead ends: 2097 [2021-04-15 05:02:49,158 INFO L226 Difference]: Without dead ends: 2097 [2021-04-15 05:02:49,159 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 208.2ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 05:02:49,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-04-15 05:02:49,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-04-15 05:02:49,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.378585086042065) internal successors, (3534), 1046 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:49,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-04-15 05:02:49,182 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-04-15 05:02:49,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:02:49,182 INFO L480 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-04-15 05:02:49,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:49,182 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-04-15 05:02:49,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:02:49,184 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:02:49,184 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:02:49,404 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:02:49,404 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:02:49,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:02:49,405 INFO L82 PathProgramCache]: Analyzing trace with hash -272805476, now seen corresponding path program 31 times [2021-04-15 05:02:49,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:02:49,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860074523] [2021-04-15 05:02:49,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:02:49,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:02:49,439 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:49,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860074523] [2021-04-15 05:02:49,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308284553] [2021-04-15 05:02:49,440 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:02:49,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:02:49,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:02:49,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:02:49,540 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:49,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:02:49,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-04-15 05:02:49,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854410517] [2021-04-15 05:02:49,542 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 05:02:49,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:02:49,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 05:02:49,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-04-15 05:02:49,543 INFO L87 Difference]: Start difference. First operand 1047 states and 3534 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:49,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:02:49,815 INFO L93 Difference]: Finished difference Result 1963 states and 6051 transitions. [2021-04-15 05:02:49,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 05:02:49,815 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:02:49,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:02:49,817 INFO L225 Difference]: With dead ends: 1963 [2021-04-15 05:02:49,817 INFO L226 Difference]: Without dead ends: 1959 [2021-04-15 05:02:49,818 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 167.1ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-04-15 05:02:49,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-04-15 05:02:49,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-04-15 05:02:49,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.376673040152964) internal successors, (3532), 1046 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:49,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-04-15 05:02:49,842 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-04-15 05:02:49,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:02:49,843 INFO L480 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-04-15 05:02:49,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:49,843 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-04-15 05:02:49,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:02:49,845 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:02:49,845 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:02:50,047 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-04-15 05:02:50,047 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:02:50,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:02:50,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1787897448, now seen corresponding path program 32 times [2021-04-15 05:02:50,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:02:50,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540265459] [2021-04-15 05:02:50,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:02:50,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:02:50,083 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:50,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540265459] [2021-04-15 05:02:50,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804730301] [2021-04-15 05:02:50,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:02:50,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:02:50,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:02:50,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:02:50,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:02:50,170 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:50,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:02:50,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-04-15 05:02:50,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602646285] [2021-04-15 05:02:50,170 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 05:02:50,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:02:50,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 05:02:50,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-04-15 05:02:50,171 INFO L87 Difference]: Start difference. First operand 1047 states and 3532 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:50,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:02:50,384 INFO L93 Difference]: Finished difference Result 1728 states and 5494 transitions. [2021-04-15 05:02:50,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 05:02:50,384 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:02:50,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:02:50,387 INFO L225 Difference]: With dead ends: 1728 [2021-04-15 05:02:50,387 INFO L226 Difference]: Without dead ends: 1716 [2021-04-15 05:02:50,387 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 125.9ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-04-15 05:02:50,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-04-15 05:02:50,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-04-15 05:02:50,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.372848948374761) internal successors, (3528), 1046 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:50,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-04-15 05:02:50,405 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-04-15 05:02:50,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:02:50,405 INFO L480 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-04-15 05:02:50,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:50,405 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-04-15 05:02:50,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:02:50,407 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:02:50,408 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:02:50,620 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:02:50,621 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:02:50,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:02:50,621 INFO L82 PathProgramCache]: Analyzing trace with hash -190770732, now seen corresponding path program 33 times [2021-04-15 05:02:50,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:02:50,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666497340] [2021-04-15 05:02:50,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:02:50,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:02:50,658 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:50,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666497340] [2021-04-15 05:02:50,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119133941] [2021-04-15 05:02:50,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:02:50,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 05:02:50,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:02:50,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:02:50,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:02:50,760 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:50,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:02:50,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-04-15 05:02:50,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240321066] [2021-04-15 05:02:50,760 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:02:50,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:02:50,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:02:50,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:02:50,761 INFO L87 Difference]: Start difference. First operand 1047 states and 3528 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:51,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:02:51,095 INFO L93 Difference]: Finished difference Result 1821 states and 5719 transitions. [2021-04-15 05:02:51,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 05:02:51,095 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:02:51,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:02:51,097 INFO L225 Difference]: With dead ends: 1821 [2021-04-15 05:02:51,097 INFO L226 Difference]: Without dead ends: 1821 [2021-04-15 05:02:51,098 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 217.9ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-04-15 05:02:51,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-04-15 05:02:51,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-04-15 05:02:51,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.370304114490161) internal successors, (3768), 1118 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:51,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-04-15 05:02:51,115 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-04-15 05:02:51,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:02:51,115 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-04-15 05:02:51,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:51,115 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-04-15 05:02:51,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:02:51,118 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:02:51,118 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:02:51,332 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-04-15 05:02:51,333 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:02:51,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:02:51,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1452268422, now seen corresponding path program 34 times [2021-04-15 05:02:51,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:02:51,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883432028] [2021-04-15 05:02:51,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:02:51,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:02:51,371 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:51,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883432028] [2021-04-15 05:02:51,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992565508] [2021-04-15 05:02:51,371 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:02:51,407 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:02:51,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:02:51,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:02:51,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:02:51,490 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:51,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:02:51,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-04-15 05:02:51,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81058249] [2021-04-15 05:02:51,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:02:51,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:02:51,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:02:51,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:02:51,491 INFO L87 Difference]: Start difference. First operand 1119 states and 3768 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:51,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:02:51,772 INFO L93 Difference]: Finished difference Result 1790 states and 5648 transitions. [2021-04-15 05:02:51,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 05:02:51,773 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:02:51,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:02:51,775 INFO L225 Difference]: With dead ends: 1790 [2021-04-15 05:02:51,775 INFO L226 Difference]: Without dead ends: 1786 [2021-04-15 05:02:51,775 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 198.8ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-04-15 05:02:51,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-04-15 05:02:51,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-04-15 05:02:51,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.368515205724508) internal successors, (3766), 1118 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:51,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-04-15 05:02:51,793 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-04-15 05:02:51,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:02:51,793 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-04-15 05:02:51,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:51,793 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-04-15 05:02:51,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:02:51,795 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:02:51,795 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:02:52,015 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-04-15 05:02:52,016 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:02:52,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:02:52,016 INFO L82 PathProgramCache]: Analyzing trace with hash 184811244, now seen corresponding path program 35 times [2021-04-15 05:02:52,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:02:52,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226617138] [2021-04-15 05:02:52,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:02:52,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:02:52,052 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:52,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226617138] [2021-04-15 05:02:52,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033872237] [2021-04-15 05:02:52,053 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:02:52,092 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 05:02:52,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:02:52,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:02:52,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:02:52,158 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:52,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:02:52,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-04-15 05:02:52,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838923195] [2021-04-15 05:02:52,159 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 05:02:52,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:02:52,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 05:02:52,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-04-15 05:02:52,159 INFO L87 Difference]: Start difference. First operand 1119 states and 3766 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:52,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:02:52,321 INFO L93 Difference]: Finished difference Result 1649 states and 5332 transitions. [2021-04-15 05:02:52,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 05:02:52,321 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:02:52,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:02:52,323 INFO L225 Difference]: With dead ends: 1649 [2021-04-15 05:02:52,323 INFO L226 Difference]: Without dead ends: 1637 [2021-04-15 05:02:52,324 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 109.5ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:02:52,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-04-15 05:02:52,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-04-15 05:02:52,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.3649373881932023) internal successors, (3762), 1118 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:52,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-04-15 05:02:52,340 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-04-15 05:02:52,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:02:52,340 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-04-15 05:02:52,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:52,340 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-04-15 05:02:52,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:02:52,341 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:02:52,341 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:02:52,542 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:02:52,542 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:02:52,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:02:52,542 INFO L82 PathProgramCache]: Analyzing trace with hash -998684486, now seen corresponding path program 4 times [2021-04-15 05:02:52,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:02:52,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101876516] [2021-04-15 05:02:52,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:02:52,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:02:52,839 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-04-15 05:02:53,186 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:53,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101876516] [2021-04-15 05:02:53,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364539719] [2021-04-15 05:02:53,187 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 05:02:53,212 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:02:53,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:02:53,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:02:53,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:02:53,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:02:53,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:02:53,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:02:53,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-04-15 05:02:53,803 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:02:53,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:02:53,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:02:53,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:02:53,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:02:53,811 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:02:53,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:02:53,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:02:53,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:02:53,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-04-15 05:02:53,820 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:02:53,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:02:53,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:02:53,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:02:53,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-04-15 05:02:53,827 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:02:53,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:02:53,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:02:53,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:02:53,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-04-15 05:02:53,833 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:02:53,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:02:53,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:02:53,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:02:53,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:02:53,840 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:02:53,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:02:53,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:02:53,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:02:53,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:02:53,850 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:02:53,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:02:53,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:02:53,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:02:53,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:02:53,864 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:02:53,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:02:53,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:02:53,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:02:53,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-04-15 05:02:53,872 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:02:53,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:02:53,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:02:53,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:02:53,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:02:53,881 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:02:53,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:02:53,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:02:53,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:02:53,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:02:53,887 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:02:53,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:02:53,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:02:53,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:02:53,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:02:53,893 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:02:53,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:02:53,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:02:53,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:02:53,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-04-15 05:02:53,900 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:02:53,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:02:53,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:02:53,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:02:53,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:02:53,908 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:02:53,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:02:53,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:02:53,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-04-15 05:02:53,915 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:02:54,013 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-04-15 05:02:54,015 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-04-15 05:02:54,015 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-04-15 05:02:54,082 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:54,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:02:54,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-04-15 05:02:54,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352608313] [2021-04-15 05:02:54,083 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:02:54,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:02:54,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:02:54,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:02:54,084 INFO L87 Difference]: Start difference. First operand 1119 states and 3762 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:54,696 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 41 [2021-04-15 05:02:54,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:02:54,988 INFO L93 Difference]: Finished difference Result 1517 states and 4955 transitions. [2021-04-15 05:02:54,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 05:02:54,988 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:02:54,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:02:54,990 INFO L225 Difference]: With dead ends: 1517 [2021-04-15 05:02:54,990 INFO L226 Difference]: Without dead ends: 1502 [2021-04-15 05:02:54,990 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1386.7ms TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2021-04-15 05:02:54,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-04-15 05:02:55,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1141. [2021-04-15 05:02:55,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 1140 states have (on average 3.362280701754386) internal successors, (3833), 1140 states have internal predecessors, (3833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:55,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3833 transitions. [2021-04-15 05:02:55,007 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3833 transitions. Word has length 26 [2021-04-15 05:02:55,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:02:55,007 INFO L480 AbstractCegarLoop]: Abstraction has 1141 states and 3833 transitions. [2021-04-15 05:02:55,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:55,007 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3833 transitions. [2021-04-15 05:02:55,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:02:55,009 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:02:55,010 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:02:55,224 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-04-15 05:02:55,225 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:02:55,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:02:55,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1267884794, now seen corresponding path program 5 times [2021-04-15 05:02:55,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:02:55,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259430187] [2021-04-15 05:02:55,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:02:55,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:02:55,855 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:55,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259430187] [2021-04-15 05:02:55,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237509118] [2021-04-15 05:02:55,856 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 [2021-04-15 05:02:55,877 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 05:02:55,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:02:55,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:02:55,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:02:56,437 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-04-15 05:02:56,502 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_3, v_prenex_5], 2=[A, v_prenex_7]} [2021-04-15 05:02:56,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:02:56,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-04-15 05:02:56,511 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:02:56,665 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-04-15 05:02:56,665 INFO L628 ElimStorePlain]: treesize reduction 54, result has 73.1 percent of original size [2021-04-15 05:02:56,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:02:56,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-04-15 05:02:56,671 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:02:56,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:02:56,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:02:56,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:02:56,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:02:56,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:02:56,732 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:02:56,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:02:56,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:02:56,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-04-15 05:02:56,739 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:02:56,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:02:56,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:02:56,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:02:56,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:02:56,792 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:02:56,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:02:56,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-04-15 05:02:56,836 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:211, output treesize:51 [2021-04-15 05:02:56,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:56,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:02:56,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-04-15 05:02:56,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620090909] [2021-04-15 05:02:56,929 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 05:02:56,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:02:56,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 05:02:56,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:02:56,930 INFO L87 Difference]: Start difference. First operand 1141 states and 3833 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:57,521 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2021-04-15 05:02:57,758 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2021-04-15 05:02:57,915 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2021-04-15 05:02:58,093 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-04-15 05:02:58,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:02:58,713 INFO L93 Difference]: Finished difference Result 1547 states and 4937 transitions. [2021-04-15 05:02:58,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 05:02:58,713 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:02:58,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:02:58,716 INFO L225 Difference]: With dead ends: 1547 [2021-04-15 05:02:58,716 INFO L226 Difference]: Without dead ends: 1502 [2021-04-15 05:02:58,716 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 2237.4ms TimeCoverageRelationStatistics Valid=202, Invalid=988, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 05:02:58,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-04-15 05:02:58,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1171. [2021-04-15 05:02:58,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1171 states, 1170 states have (on average 3.347008547008547) internal successors, (3916), 1170 states have internal predecessors, (3916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:58,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1171 states to 1171 states and 3916 transitions. [2021-04-15 05:02:58,736 INFO L78 Accepts]: Start accepts. Automaton has 1171 states and 3916 transitions. Word has length 26 [2021-04-15 05:02:58,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:02:58,736 INFO L480 AbstractCegarLoop]: Abstraction has 1171 states and 3916 transitions. [2021-04-15 05:02:58,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:02:58,736 INFO L276 IsEmpty]: Start isEmpty. Operand 1171 states and 3916 transitions. [2021-04-15 05:02:58,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:02:58,738 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:02:58,738 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:02:58,952 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:02:58,953 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:02:58,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:02:58,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1435653194, now seen corresponding path program 36 times [2021-04-15 05:02:58,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:02:58,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215491095] [2021-04-15 05:02:58,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:02:58,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:02:59,395 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-04-15 05:02:59,520 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-04-15 05:02:59,627 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:02:59,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215491095] [2021-04-15 05:02:59,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289243975] [2021-04-15 05:02:59,627 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 [2021-04-15 05:02:59,649 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 05:02:59,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:02:59,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:02:59,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:03:00,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:00,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:00,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:00,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:00,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:00,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:00,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-04-15 05:03:00,340 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:00,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:00,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:00,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:00,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:00,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:00,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:00,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-04-15 05:03:00,350 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:00,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:00,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:00,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:00,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:00,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:00,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:00,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-04-15 05:03:00,362 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:00,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:00,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:00,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:00,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:00,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:00,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:00,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-04-15 05:03:00,376 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:00,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:00,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:00,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:00,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:00,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:00,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:00,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-04-15 05:03:00,388 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:00,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:00,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:00,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:00,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:00,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:00,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:00,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-04-15 05:03:00,402 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:00,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:00,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:00,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:00,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:00,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:00,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:00,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-04-15 05:03:00,414 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:00,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:00,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:00,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:00,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:00,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:00,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:00,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-04-15 05:03:00,426 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:00,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:00,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:00,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:00,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:00,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:00,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:00,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-04-15 05:03:00,439 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:00,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:00,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:00,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:00,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:00,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:00,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:00,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-04-15 05:03:00,451 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:00,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:00,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:00,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:00,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:00,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:00,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:00,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-04-15 05:03:00,462 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:00,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:00,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:00,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:00,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:00,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:00,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:00,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-04-15 05:03:00,477 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:00,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:00,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:00,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:00,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:00,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:00,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:00,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-04-15 05:03:00,488 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:00,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:00,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:00,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:00,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:00,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:00,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:00,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-04-15 05:03:00,499 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:00,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:00,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:00,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:00,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:00,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-04-15 05:03:00,506 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:00,537 INFO L628 ElimStorePlain]: treesize reduction 16, result has 62.8 percent of original size [2021-04-15 05:03:00,538 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 05:03:00,539 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-04-15 05:03:00,580 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:03:00,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:03:00,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-04-15 05:03:00,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613557276] [2021-04-15 05:03:00,581 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:03:00,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:03:00,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:03:00,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:03:00,582 INFO L87 Difference]: Start difference. First operand 1171 states and 3916 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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) [2021-04-15 05:03:01,143 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 47 [2021-04-15 05:03:02,128 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2021-04-15 05:03:02,388 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 50 [2021-04-15 05:03:02,544 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 56 [2021-04-15 05:03:02,669 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 44 [2021-04-15 05:03:03,017 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 52 [2021-04-15 05:03:03,204 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 59 [2021-04-15 05:03:03,487 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-04-15 05:03:03,659 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 55 [2021-04-15 05:03:03,945 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2021-04-15 05:03:04,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:03:04,049 INFO L93 Difference]: Finished difference Result 1671 states and 5380 transitions. [2021-04-15 05:03:04,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-04-15 05:03:04,049 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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 26 [2021-04-15 05:03:04,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:03:04,051 INFO L225 Difference]: With dead ends: 1671 [2021-04-15 05:03:04,051 INFO L226 Difference]: Without dead ends: 1656 [2021-04-15 05:03:04,052 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 3766.5ms TimeCoverageRelationStatistics Valid=375, Invalid=1881, Unknown=0, NotChecked=0, Total=2256 [2021-04-15 05:03:04,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1656 states. [2021-04-15 05:03:04,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1656 to 1201. [2021-04-15 05:03:04,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1201 states, 1200 states have (on average 3.3316666666666666) internal successors, (3998), 1200 states have internal predecessors, (3998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:03:04,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 3998 transitions. [2021-04-15 05:03:04,066 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 3998 transitions. Word has length 26 [2021-04-15 05:03:04,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:03:04,067 INFO L480 AbstractCegarLoop]: Abstraction has 1201 states and 3998 transitions. [2021-04-15 05:03:04,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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) [2021-04-15 05:03:04,067 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 3998 transitions. [2021-04-15 05:03:04,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:03:04,068 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:03:04,068 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:03:04,269 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-04-15 05:03:04,269 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:03:04,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:03:04,269 INFO L82 PathProgramCache]: Analyzing trace with hash -630606018, now seen corresponding path program 6 times [2021-04-15 05:03:04,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:03:04,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002570708] [2021-04-15 05:03:04,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:03:04,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:03:04,501 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-04-15 05:03:04,734 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2021-04-15 05:03:04,922 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:03:04,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002570708] [2021-04-15 05:03:04,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648887254] [2021-04-15 05:03:04,923 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 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 [2021-04-15 05:03:04,948 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 05:03:04,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:03:04,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:03:04,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:03:05,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:05,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:05,268 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:03:05,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-04-15 05:03:05,270 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:05,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:05,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:05,285 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:03:05,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-04-15 05:03:05,286 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:05,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:05,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:05,303 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:03:05,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 28 [2021-04-15 05:03:05,309 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:05,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:05,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:05,327 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:03:05,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 23 [2021-04-15 05:03:05,329 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:05,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:05,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:05,347 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:03:05,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 23 [2021-04-15 05:03:05,349 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:05,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:05,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:05,364 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:03:05,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 25 [2021-04-15 05:03:05,365 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:05,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:05,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:05,380 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:03:05,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 27 [2021-04-15 05:03:05,382 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:05,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:05,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:05,396 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:03:05,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 30 [2021-04-15 05:03:05,397 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:05,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:05,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:05,410 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:03:05,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 24 [2021-04-15 05:03:05,411 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:05,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:05,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:05,425 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:03:05,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 27 [2021-04-15 05:03:05,426 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:05,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:05,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:05,441 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:03:05,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 25 [2021-04-15 05:03:05,442 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:05,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:05,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:05,458 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:03:05,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2021-04-15 05:03:05,464 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:05,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:05,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:05,482 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:03:05,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 30 [2021-04-15 05:03:05,484 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:05,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:05,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:05,501 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:03:05,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 31 [2021-04-15 05:03:05,505 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:05,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:05,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:05,520 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:03:05,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 24 [2021-04-15 05:03:05,523 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:05,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:05,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:05,531 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:03:05,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 22 [2021-04-15 05:03:05,533 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:05,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:03:05,634 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-04-15 05:03:05,634 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:865, output treesize:221 [2021-04-15 05:03:05,863 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:03:05,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:03:05,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-04-15 05:03:05,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451079715] [2021-04-15 05:03:05,863 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:03:05,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:03:05,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:03:05,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:03:05,864 INFO L87 Difference]: Start difference. First operand 1201 states and 3998 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:03:06,446 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 53 [2021-04-15 05:03:06,707 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2021-04-15 05:03:06,845 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2021-04-15 05:03:07,002 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 48 [2021-04-15 05:03:07,127 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 42 [2021-04-15 05:03:07,560 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 61 [2021-04-15 05:03:07,781 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 57 [2021-04-15 05:03:08,095 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 62 [2021-04-15 05:03:08,265 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 60 [2021-04-15 05:03:08,880 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 52 [2021-04-15 05:03:09,171 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 42 [2021-04-15 05:03:09,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:03:09,280 INFO L93 Difference]: Finished difference Result 1873 states and 5950 transitions. [2021-04-15 05:03:09,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 05:03:09,281 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:03:09,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:03:09,283 INFO L225 Difference]: With dead ends: 1873 [2021-04-15 05:03:09,283 INFO L226 Difference]: Without dead ends: 1858 [2021-04-15 05:03:09,284 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 3636.5ms TimeCoverageRelationStatistics Valid=290, Invalid=1602, Unknown=0, NotChecked=0, Total=1892 [2021-04-15 05:03:09,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2021-04-15 05:03:09,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 1210. [2021-04-15 05:03:09,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1210 states, 1209 states have (on average 3.339950372208437) internal successors, (4038), 1209 states have internal predecessors, (4038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:03:09,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 4038 transitions. [2021-04-15 05:03:09,300 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 4038 transitions. Word has length 26 [2021-04-15 05:03:09,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:03:09,300 INFO L480 AbstractCegarLoop]: Abstraction has 1210 states and 4038 transitions. [2021-04-15 05:03:09,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:03:09,300 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 4038 transitions. [2021-04-15 05:03:09,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:03:09,302 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:03:09,302 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:03:09,503 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:03:09,503 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:03:09,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:03:09,503 INFO L82 PathProgramCache]: Analyzing trace with hash 919775546, now seen corresponding path program 37 times [2021-04-15 05:03:09,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:03:09,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729544624] [2021-04-15 05:03:09,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:03:09,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:03:09,751 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2021-04-15 05:03:09,870 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2021-04-15 05:03:10,032 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-04-15 05:03:10,280 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:03:10,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729544624] [2021-04-15 05:03:10,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202559785] [2021-04-15 05:03:10,281 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 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 [2021-04-15 05:03:10,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:03:10,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:03:10,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:03:10,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:10,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:10,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:10,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:10,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:10,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:10,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-04-15 05:03:10,970 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:10,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:10,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:10,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:10,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:10,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:10,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:10,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-04-15 05:03:10,981 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:10,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:10,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:10,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:10,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:10,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:10,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:10,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-04-15 05:03:10,993 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:10,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:11,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:11,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:11,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:11,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:11,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:11,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-04-15 05:03:11,006 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:11,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:11,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:11,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:11,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:11,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:11,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:11,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-04-15 05:03:11,019 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:11,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:11,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:11,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:11,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:11,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:11,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:11,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-04-15 05:03:11,055 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:11,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:11,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:11,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:11,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:11,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:11,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:11,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-04-15 05:03:11,068 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:11,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:11,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:11,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:11,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:11,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:11,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:11,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-04-15 05:03:11,080 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:11,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:11,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:11,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:11,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:11,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:11,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:11,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-04-15 05:03:11,091 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:11,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:11,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:11,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:11,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:11,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:11,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:11,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-04-15 05:03:11,102 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:11,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:11,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:11,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:11,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:11,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:11,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:11,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-04-15 05:03:11,112 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:11,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:11,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:11,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:11,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:11,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:11,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:11,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-04-15 05:03:11,123 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:11,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:11,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:11,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:11,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:11,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:11,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:11,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-04-15 05:03:11,135 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:11,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:11,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:11,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:11,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:11,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:11,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:11,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-04-15 05:03:11,146 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:11,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:11,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:11,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:11,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:11,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-04-15 05:03:11,153 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:11,184 INFO L628 ElimStorePlain]: treesize reduction 16, result has 62.8 percent of original size [2021-04-15 05:03:11,186 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 05:03:11,186 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-04-15 05:03:11,230 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:03:11,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:03:11,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-04-15 05:03:11,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020104260] [2021-04-15 05:03:11,231 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:03:11,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:03:11,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:03:11,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:03:11,231 INFO L87 Difference]: Start difference. First operand 1210 states and 4038 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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) [2021-04-15 05:03:11,742 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 46 [2021-04-15 05:03:11,862 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 38 [2021-04-15 05:03:12,733 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 48 [2021-04-15 05:03:12,872 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 40 [2021-04-15 05:03:13,016 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 49 [2021-04-15 05:03:13,184 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 56 [2021-04-15 05:03:13,339 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 56 [2021-04-15 05:03:13,567 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 49 [2021-04-15 05:03:13,765 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 53 [2021-04-15 05:03:13,964 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 58 [2021-04-15 05:03:14,350 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-04-15 05:03:14,520 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 55 [2021-04-15 05:03:14,672 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 55 [2021-04-15 05:03:14,824 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 52 [2021-04-15 05:03:15,136 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2021-04-15 05:03:15,359 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 56 [2021-04-15 05:03:15,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:03:15,523 INFO L93 Difference]: Finished difference Result 1907 states and 6071 transitions. [2021-04-15 05:03:15,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-04-15 05:03:15,523 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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 26 [2021-04-15 05:03:15,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:03:15,527 INFO L225 Difference]: With dead ends: 1907 [2021-04-15 05:03:15,527 INFO L226 Difference]: Without dead ends: 1892 [2021-04-15 05:03:15,528 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 4421.3ms TimeCoverageRelationStatistics Valid=479, Invalid=2277, Unknown=0, NotChecked=0, Total=2756 [2021-04-15 05:03:15,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1892 states. [2021-04-15 05:03:15,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1892 to 1221. [2021-04-15 05:03:15,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 1220 states have (on average 3.3459016393442624) internal successors, (4082), 1220 states have internal predecessors, (4082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:03:15,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 4082 transitions. [2021-04-15 05:03:15,544 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 4082 transitions. Word has length 26 [2021-04-15 05:03:15,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:03:15,544 INFO L480 AbstractCegarLoop]: Abstraction has 1221 states and 4082 transitions. [2021-04-15 05:03:15,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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) [2021-04-15 05:03:15,545 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 4082 transitions. [2021-04-15 05:03:15,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:03:15,546 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:03:15,546 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:03:15,747 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-04-15 05:03:15,747 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:03:15,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:03:15,747 INFO L82 PathProgramCache]: Analyzing trace with hash -56543298, now seen corresponding path program 38 times [2021-04-15 05:03:15,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:03:15,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103931109] [2021-04-15 05:03:15,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:03:15,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:03:15,975 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 30 [2021-04-15 05:03:16,101 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 33 [2021-04-15 05:03:16,285 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2021-04-15 05:03:16,421 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2021-04-15 05:03:16,664 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:03:16,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103931109] [2021-04-15 05:03:16,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939495397] [2021-04-15 05:03:16,664 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 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 [2021-04-15 05:03:16,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:03:16,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:03:16,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:03:16,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:03:17,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:17,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:17,512 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-04-15 05:03:17,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 30 [2021-04-15 05:03:17,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:17,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:17,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:17,557 INFO L354 Elim1Store]: treesize reduction 16, result has 40.7 percent of original size [2021-04-15 05:03:17,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 29 [2021-04-15 05:03:17,559 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:17,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:17,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:17,594 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-04-15 05:03:17,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 33 [2021-04-15 05:03:17,610 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:17,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:17,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:17,654 INFO L354 Elim1Store]: treesize reduction 9, result has 66.7 percent of original size [2021-04-15 05:03:17,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 36 [2021-04-15 05:03:17,658 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:17,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:17,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:17,680 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-04-15 05:03:17,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 1 [2021-04-15 05:03:17,681 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:17,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:17,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:17,703 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-04-15 05:03:17,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-04-15 05:03:17,704 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:17,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:17,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:17,727 INFO L354 Elim1Store]: treesize reduction 24, result has 11.1 percent of original size [2021-04-15 05:03:17,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 22 [2021-04-15 05:03:17,728 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:17,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:17,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:17,746 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-04-15 05:03:17,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-04-15 05:03:17,747 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:17,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:17,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:17,764 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-04-15 05:03:17,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-04-15 05:03:17,765 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:17,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:17,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:17,791 INFO L354 Elim1Store]: treesize reduction 16, result has 40.7 percent of original size [2021-04-15 05:03:17,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 26 [2021-04-15 05:03:17,793 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:17,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:17,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:17,822 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-04-15 05:03:17,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 28 [2021-04-15 05:03:17,827 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:17,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:17,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:17,855 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-04-15 05:03:17,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 28 [2021-04-15 05:03:17,857 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:17,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:17,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:17,884 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:03:17,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 39 [2021-04-15 05:03:17,905 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:17,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:17,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:17,927 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-04-15 05:03:17,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-04-15 05:03:17,928 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:17,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:17,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:17,949 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-04-15 05:03:17,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-04-15 05:03:17,950 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:17,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:17,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:17,963 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-04-15 05:03:17,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-04-15 05:03:17,964 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:18,110 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2021-04-15 05:03:18,110 INFO L628 ElimStorePlain]: treesize reduction 123, result has 52.0 percent of original size [2021-04-15 05:03:18,113 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-04-15 05:03:18,113 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:841, output treesize:148 [2021-04-15 05:03:18,296 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:03:18,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:03:18,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-04-15 05:03:18,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549822170] [2021-04-15 05:03:18,296 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 05:03:18,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:03:18,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 05:03:18,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-04-15 05:03:18,297 INFO L87 Difference]: Start difference. First operand 1221 states and 4082 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:03:19,276 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 39 [2021-04-15 05:03:19,417 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 42 [2021-04-15 05:03:20,258 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 51 [2021-04-15 05:03:20,434 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 62 [2021-04-15 05:03:20,842 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 48 [2021-04-15 05:03:20,981 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 45 [2021-04-15 05:03:21,602 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 53 [2021-04-15 05:03:21,737 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2021-04-15 05:03:22,104 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 53 [2021-04-15 05:03:22,262 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2021-04-15 05:03:22,455 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2021-04-15 05:03:22,890 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 72 [2021-04-15 05:03:23,307 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 70 [2021-04-15 05:03:23,537 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 41 [2021-04-15 05:03:23,872 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2021-04-15 05:03:24,130 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 71 [2021-04-15 05:03:24,320 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 42 [2021-04-15 05:03:24,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:03:24,483 INFO L93 Difference]: Finished difference Result 2629 states and 8153 transitions. [2021-04-15 05:03:24,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-04-15 05:03:24,483 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:03:24,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:03:24,488 INFO L225 Difference]: With dead ends: 2629 [2021-04-15 05:03:24,488 INFO L226 Difference]: Without dead ends: 2584 [2021-04-15 05:03:24,489 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1219 ImplicationChecksByTransitivity, 6526.1ms TimeCoverageRelationStatistics Valid=599, Invalid=3691, Unknown=0, NotChecked=0, Total=4290 [2021-04-15 05:03:24,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2584 states. [2021-04-15 05:03:24,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2584 to 1396. [2021-04-15 05:03:24,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1396 states, 1395 states have (on average 3.3161290322580643) internal successors, (4626), 1395 states have internal predecessors, (4626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:03:24,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1396 states to 1396 states and 4626 transitions. [2021-04-15 05:03:24,510 INFO L78 Accepts]: Start accepts. Automaton has 1396 states and 4626 transitions. Word has length 26 [2021-04-15 05:03:24,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:03:24,511 INFO L480 AbstractCegarLoop]: Abstraction has 1396 states and 4626 transitions. [2021-04-15 05:03:24,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:03:24,511 INFO L276 IsEmpty]: Start isEmpty. Operand 1396 states and 4626 transitions. [2021-04-15 05:03:24,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:03:24,513 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:03:24,513 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:03:24,713 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable314 [2021-04-15 05:03:24,713 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:03:24,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:03:24,714 INFO L82 PathProgramCache]: Analyzing trace with hash -2141610526, now seen corresponding path program 7 times [2021-04-15 05:03:24,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:03:24,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618115150] [2021-04-15 05:03:24,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:03:24,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:03:25,020 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2021-04-15 05:03:25,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:03:25,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618115150] [2021-04-15 05:03:25,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829877396] [2021-04-15 05:03:25,255 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 05:03:25,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:03:25,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:03:25,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:03:25,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:25,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:25,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:25,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:03:25,783 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:25,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:25,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:25,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:25,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:03:25,792 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:25,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:25,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:25,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:25,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-04-15 05:03:25,801 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:25,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:25,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:25,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:25,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:03:25,811 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:25,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:25,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:25,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:25,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-04-15 05:03:25,820 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:25,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:25,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:25,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:25,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-04-15 05:03:25,828 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:25,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:25,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:25,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:25,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:03:25,837 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:25,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:25,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:25,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:25,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-04-15 05:03:25,844 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:25,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:25,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:25,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:25,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:03:25,852 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:25,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:25,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:25,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:25,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-04-15 05:03:25,862 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:25,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:25,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:25,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:25,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:03:25,869 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:25,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:25,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:25,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:25,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-04-15 05:03:25,878 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:25,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:25,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:25,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:25,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:03:25,887 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:25,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:25,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:25,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:25,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-04-15 05:03:25,896 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:25,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:25,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:25,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:03:25,901 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:26,002 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-04-15 05:03:26,003 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-04-15 05:03:26,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-04-15 05:03:26,005 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-04-15 05:03:26,062 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:03:26,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:03:26,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-04-15 05:03:26,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253576092] [2021-04-15 05:03:26,062 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:03:26,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:03:26,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:03:26,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:03:26,063 INFO L87 Difference]: Start difference. First operand 1396 states and 4626 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:03:26,698 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-04-15 05:03:27,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:03:27,289 INFO L93 Difference]: Finished difference Result 1801 states and 5846 transitions. [2021-04-15 05:03:27,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 05:03:27,289 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:03:27,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:03:27,293 INFO L225 Difference]: With dead ends: 1801 [2021-04-15 05:03:27,293 INFO L226 Difference]: Without dead ends: 1786 [2021-04-15 05:03:27,294 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1543.5ms TimeCoverageRelationStatistics Valid=171, Invalid=641, Unknown=0, NotChecked=0, Total=812 [2021-04-15 05:03:27,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-04-15 05:03:27,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1407. [2021-04-15 05:03:27,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1407 states, 1406 states have (on average 3.313655761024182) internal successors, (4659), 1406 states have internal predecessors, (4659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:03:27,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1407 states to 1407 states and 4659 transitions. [2021-04-15 05:03:27,314 INFO L78 Accepts]: Start accepts. Automaton has 1407 states and 4659 transitions. Word has length 26 [2021-04-15 05:03:27,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:03:27,315 INFO L480 AbstractCegarLoop]: Abstraction has 1407 states and 4659 transitions. [2021-04-15 05:03:27,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:03:27,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1407 states and 4659 transitions. [2021-04-15 05:03:27,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:03:27,317 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:03:27,317 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:03:27,517 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable418,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:03:27,517 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:03:27,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:03:27,518 INFO L82 PathProgramCache]: Analyzing trace with hash 124958754, now seen corresponding path program 8 times [2021-04-15 05:03:27,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:03:27,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600993043] [2021-04-15 05:03:27,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:03:27,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:03:27,748 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-04-15 05:03:27,859 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2021-04-15 05:03:28,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:03:28,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600993043] [2021-04-15 05:03:28,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852134348] [2021-04-15 05:03:28,102 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 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 [2021-04-15 05:03:28,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:03:28,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:03:28,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-04-15 05:03:28,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:03:28,600 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-04-15 05:03:28,689 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-04-15 05:03:28,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-04-15 05:03:28,691 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:28,839 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-04-15 05:03:28,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:03:28,858 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:03:28,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-04-15 05:03:28,865 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:29,008 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-04-15 05:03:29,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:03:29,028 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:03:29,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-04-15 05:03:29,030 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:29,203 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-04-15 05:03:29,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:03:29,228 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-04-15 05:03:29,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-04-15 05:03:29,231 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:29,383 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-04-15 05:03:29,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:03:29,406 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-04-15 05:03:29,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-04-15 05:03:29,412 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:29,555 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-04-15 05:03:29,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:03:29,575 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:03:29,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-04-15 05:03:29,578 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:29,725 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-04-15 05:03:29,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:03:29,748 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-04-15 05:03:29,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-04-15 05:03:29,750 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:29,888 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-04-15 05:03:29,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:03:29,914 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-04-15 05:03:29,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-04-15 05:03:29,919 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:30,078 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-04-15 05:03:30,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:03:30,103 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-04-15 05:03:30,103 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:365, output treesize:376 [2021-04-15 05:03:30,496 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-04-15 05:03:30,642 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:03:30,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:03:30,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-04-15 05:03:30,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459344048] [2021-04-15 05:03:30,643 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:03:30,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:03:30,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:03:30,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:03:30,644 INFO L87 Difference]: Start difference. First operand 1407 states and 4659 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:03:31,276 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2021-04-15 05:03:31,622 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2021-04-15 05:03:31,759 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 57 [2021-04-15 05:03:31,979 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2021-04-15 05:03:32,122 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-04-15 05:03:32,400 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-04-15 05:03:32,891 WARN L205 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 76 [2021-04-15 05:03:33,139 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2021-04-15 05:03:33,281 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-04-15 05:03:33,563 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 31 [2021-04-15 05:03:33,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:03:33,686 INFO L93 Difference]: Finished difference Result 1848 states and 5971 transitions. [2021-04-15 05:03:33,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 05:03:33,686 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:03:33,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:03:33,689 INFO L225 Difference]: With dead ends: 1848 [2021-04-15 05:03:33,689 INFO L226 Difference]: Without dead ends: 1833 [2021-04-15 05:03:33,690 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 3787.0ms TimeCoverageRelationStatistics Valid=220, Invalid=1112, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 05:03:33,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1833 states. [2021-04-15 05:03:33,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1833 to 1415. [2021-04-15 05:03:33,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1415 states, 1414 states have (on average 3.3125884016973126) internal successors, (4684), 1414 states have internal predecessors, (4684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:03:33,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1415 states to 1415 states and 4684 transitions. [2021-04-15 05:03:33,707 INFO L78 Accepts]: Start accepts. Automaton has 1415 states and 4684 transitions. Word has length 26 [2021-04-15 05:03:33,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:03:33,708 INFO L480 AbstractCegarLoop]: Abstraction has 1415 states and 4684 transitions. [2021-04-15 05:03:33,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:03:33,708 INFO L276 IsEmpty]: Start isEmpty. Operand 1415 states and 4684 transitions. [2021-04-15 05:03:33,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:03:33,710 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:03:33,710 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:03:33,913 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable450 [2021-04-15 05:03:33,913 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:03:33,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:03:33,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1812450954, now seen corresponding path program 9 times [2021-04-15 05:03:33,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:03:33,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133345897] [2021-04-15 05:03:33,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:03:33,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:03:34,413 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:03:34,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133345897] [2021-04-15 05:03:34,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373048523] [2021-04-15 05:03:34,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 05:03:34,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 05:03:34,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:03:34,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:03:34,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:03:34,955 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2021-04-15 05:03:35,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:35,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:35,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:35,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-04-15 05:03:35,272 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:35,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:35,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:35,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 7 [2021-04-15 05:03:35,281 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:35,485 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-04-15 05:03:35,486 INFO L628 ElimStorePlain]: treesize reduction 98, result has 62.0 percent of original size [2021-04-15 05:03:35,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:35,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:35,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:03:35,493 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:35,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:03:35,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:35,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-04-15 05:03:35,571 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:35,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:35,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:35,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:03:35,580 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:35,653 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:03:35,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:35,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:35,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-04-15 05:03:35,661 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:35,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:03:35,728 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-04-15 05:03:35,728 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 12 variables, input treesize:309, output treesize:51 [2021-04-15 05:03:35,786 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:03:35,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:03:35,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-04-15 05:03:35,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769473329] [2021-04-15 05:03:35,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:03:35,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:03:35,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:03:35,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:03:35,787 INFO L87 Difference]: Start difference. First operand 1415 states and 4684 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:03:36,547 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 49 [2021-04-15 05:03:36,813 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 53 [2021-04-15 05:03:37,056 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 63 [2021-04-15 05:03:37,410 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 68 [2021-04-15 05:03:37,747 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 75 [2021-04-15 05:03:37,963 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-04-15 05:03:38,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:03:38,056 INFO L93 Difference]: Finished difference Result 1769 states and 5693 transitions. [2021-04-15 05:03:38,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 05:03:38,057 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:03:38,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:03:38,059 INFO L225 Difference]: With dead ends: 1769 [2021-04-15 05:03:38,059 INFO L226 Difference]: Without dead ends: 1754 [2021-04-15 05:03:38,060 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 2796.9ms TimeCoverageRelationStatistics Valid=217, Invalid=839, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 05:03:38,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1754 states. [2021-04-15 05:03:38,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1754 to 1433. [2021-04-15 05:03:38,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1433 states, 1432 states have (on average 3.3170391061452515) internal successors, (4750), 1432 states have internal predecessors, (4750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:03:38,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1433 states to 1433 states and 4750 transitions. [2021-04-15 05:03:38,076 INFO L78 Accepts]: Start accepts. Automaton has 1433 states and 4750 transitions. Word has length 26 [2021-04-15 05:03:38,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:03:38,076 INFO L480 AbstractCegarLoop]: Abstraction has 1433 states and 4750 transitions. [2021-04-15 05:03:38,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:03:38,077 INFO L276 IsEmpty]: Start isEmpty. Operand 1433 states and 4750 transitions. [2021-04-15 05:03:38,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:03:38,078 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:03:38,079 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:03:38,279 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2021-04-15 05:03:38,279 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:03:38,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:03:38,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1980260046, now seen corresponding path program 10 times [2021-04-15 05:03:38,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:03:38,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583875800] [2021-04-15 05:03:38,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:03:38,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:03:38,469 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2021-04-15 05:03:38,602 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2021-04-15 05:03:38,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:03:38,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583875800] [2021-04-15 05:03:38,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544560742] [2021-04-15 05:03:38,866 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 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 [2021-04-15 05:03:38,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:03:38,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:03:38,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:03:38,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:03:39,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:39,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:39,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:39,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:03:39,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:39,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:39,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:39,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:39,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-04-15 05:03:39,338 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:39,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:39,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:39,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:39,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-04-15 05:03:39,346 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:39,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:39,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:39,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:39,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-04-15 05:03:39,355 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:39,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:39,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:39,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:39,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:03:39,363 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:39,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:39,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:39,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:39,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-04-15 05:03:39,371 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:39,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:39,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:39,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:39,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:03:39,380 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:39,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:39,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:39,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:39,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:03:39,387 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:39,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:39,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:39,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:39,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-04-15 05:03:39,396 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:39,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:39,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:39,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:39,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:03:39,403 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:39,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:39,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:39,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:39,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:03:39,409 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:39,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:39,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:39,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:39,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:03:39,416 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:39,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:39,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:39,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:39,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-04-15 05:03:39,427 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:39,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:39,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:39,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:39,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-04-15 05:03:39,435 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:39,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:39,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:39,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:03:39,441 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:39,523 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-04-15 05:03:39,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-04-15 05:03:39,524 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-04-15 05:03:39,591 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:03:39,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:03:39,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-04-15 05:03:39,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649538643] [2021-04-15 05:03:39,591 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:03:39,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:03:39,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:03:39,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:03:39,592 INFO L87 Difference]: Start difference. First operand 1433 states and 4750 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:03:40,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:03:40,441 INFO L93 Difference]: Finished difference Result 1743 states and 5703 transitions. [2021-04-15 05:03:40,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 05:03:40,442 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:03:40,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:03:40,445 INFO L225 Difference]: With dead ends: 1743 [2021-04-15 05:03:40,445 INFO L226 Difference]: Without dead ends: 1728 [2021-04-15 05:03:40,445 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1286.7ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-04-15 05:03:40,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1728 states. [2021-04-15 05:03:40,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1728 to 1442. [2021-04-15 05:03:40,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 3.3213046495489245) internal successors, (4786), 1441 states have internal predecessors, (4786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:03:40,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 4786 transitions. [2021-04-15 05:03:40,463 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 4786 transitions. Word has length 26 [2021-04-15 05:03:40,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:03:40,463 INFO L480 AbstractCegarLoop]: Abstraction has 1442 states and 4786 transitions. [2021-04-15 05:03:40,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:03:40,463 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 4786 transitions. [2021-04-15 05:03:40,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:03:40,465 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:03:40,465 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:03:40,666 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2021-04-15 05:03:40,667 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:03:40,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:03:40,667 INFO L82 PathProgramCache]: Analyzing trace with hash 247191222, now seen corresponding path program 11 times [2021-04-15 05:03:40,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:03:40,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728248045] [2021-04-15 05:03:40,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:03:40,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:03:40,961 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-04-15 05:03:41,084 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-04-15 05:03:41,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:03:41,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728248045] [2021-04-15 05:03:41,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151208012] [2021-04-15 05:03:41,258 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 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 [2021-04-15 05:03:41,279 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 05:03:41,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:03:41,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:03:41,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:03:41,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:41,747 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:03:41,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:03:41,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:41,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:41,759 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:03:41,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:03:41,760 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:41,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:41,769 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:03:41,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-04-15 05:03:41,770 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:41,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:41,782 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:03:41,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-04-15 05:03:41,784 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:41,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:41,796 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:03:41,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-04-15 05:03:41,801 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:41,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:41,814 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:03:41,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-04-15 05:03:41,818 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:41,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:41,831 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:03:41,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-04-15 05:03:41,833 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:41,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:41,843 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:03:41,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-04-15 05:03:41,843 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:41,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:41,856 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:03:41,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-04-15 05:03:41,857 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:41,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:41,870 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:03:41,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-04-15 05:03:41,882 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:41,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:41,896 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:03:41,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-04-15 05:03:41,897 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:41,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:41,913 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:03:41,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-04-15 05:03:41,917 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:41,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:41,930 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:03:41,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-04-15 05:03:41,931 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:41,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:41,940 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:03:41,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-04-15 05:03:41,941 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:41,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:41,950 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:03:41,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:03:41,951 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:41,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:41,957 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:03:41,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:03:41,958 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:42,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:03:42,055 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-04-15 05:03:42,055 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:657, output treesize:174 [2021-04-15 05:03:42,273 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:03:42,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:03:42,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-04-15 05:03:42,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513094907] [2021-04-15 05:03:42,273 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 05:03:42,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:03:42,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 05:03:42,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:03:42,274 INFO L87 Difference]: Start difference. First operand 1442 states and 4786 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:03:42,793 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 38 [2021-04-15 05:03:43,055 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 55 [2021-04-15 05:03:43,584 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 49 [2021-04-15 05:03:43,767 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2021-04-15 05:03:44,031 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 50 [2021-04-15 05:03:44,240 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2021-04-15 05:03:44,439 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2021-04-15 05:03:45,150 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2021-04-15 05:03:45,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:03:45,433 INFO L93 Difference]: Finished difference Result 2256 states and 7236 transitions. [2021-04-15 05:03:45,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 05:03:45,433 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:03:45,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:03:45,438 INFO L225 Difference]: With dead ends: 2256 [2021-04-15 05:03:45,438 INFO L226 Difference]: Without dead ends: 2226 [2021-04-15 05:03:45,438 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 3331.6ms TimeCoverageRelationStatistics Valid=322, Invalid=1570, Unknown=0, NotChecked=0, Total=1892 [2021-04-15 05:03:45,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2021-04-15 05:03:45,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 1442. [2021-04-15 05:03:45,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 3.3213046495489245) internal successors, (4786), 1441 states have internal predecessors, (4786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:03:45,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 4786 transitions. [2021-04-15 05:03:45,460 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 4786 transitions. Word has length 26 [2021-04-15 05:03:45,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:03:45,461 INFO L480 AbstractCegarLoop]: Abstraction has 1442 states and 4786 transitions. [2021-04-15 05:03:45,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:03:45,461 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 4786 transitions. [2021-04-15 05:03:45,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:03:45,464 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:03:45,464 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:03:45,680 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable530 [2021-04-15 05:03:45,681 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:03:45,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:03:45,681 INFO L82 PathProgramCache]: Analyzing trace with hash -249530138, now seen corresponding path program 12 times [2021-04-15 05:03:45,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:03:45,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864195808] [2021-04-15 05:03:45,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:03:45,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:03:46,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:03:46,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864195808] [2021-04-15 05:03:46,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876977559] [2021-04-15 05:03:46,174 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 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 [2021-04-15 05:03:46,196 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 05:03:46,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:03:46,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:03:46,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:03:46,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:46,476 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:03:46,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:03:46,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:46,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:46,488 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:03:46,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:03:46,489 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:46,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:46,502 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:03:46,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-04-15 05:03:46,504 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:46,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:46,515 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:03:46,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:03:46,516 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:46,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:46,532 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:03:46,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-04-15 05:03:46,535 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:46,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:46,547 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:03:46,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-04-15 05:03:46,549 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:46,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:46,559 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:03:46,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:03:46,560 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:46,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:46,580 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:03:46,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-04-15 05:03:46,582 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:46,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:46,595 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:03:46,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-04-15 05:03:46,596 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:46,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:46,612 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:03:46,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-04-15 05:03:46,617 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:46,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:46,631 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:03:46,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-04-15 05:03:46,633 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:46,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:46,649 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:03:46,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-04-15 05:03:46,652 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:46,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:46,670 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:03:46,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-04-15 05:03:46,672 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:46,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:46,687 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:03:46,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-04-15 05:03:46,693 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:46,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:46,705 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:03:46,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-04-15 05:03:46,707 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:46,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:46,715 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:03:46,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-04-15 05:03:46,717 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:46,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:03:46,814 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-04-15 05:03:46,814 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-04-15 05:03:47,056 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:03:47,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:03:47,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-04-15 05:03:47,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145761324] [2021-04-15 05:03:47,057 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:03:47,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:03:47,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:03:47,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:03:47,058 INFO L87 Difference]: Start difference. First operand 1442 states and 4786 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:03:47,539 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2021-04-15 05:03:47,803 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2021-04-15 05:03:47,943 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2021-04-15 05:03:48,334 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 48 [2021-04-15 05:03:48,493 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2021-04-15 05:03:48,893 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 49 [2021-04-15 05:03:49,130 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2021-04-15 05:03:49,300 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 57 [2021-04-15 05:03:49,970 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2021-04-15 05:03:50,228 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 42 [2021-04-15 05:03:50,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:03:50,296 INFO L93 Difference]: Finished difference Result 2069 states and 6722 transitions. [2021-04-15 05:03:50,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 05:03:50,296 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:03:50,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:03:50,299 INFO L225 Difference]: With dead ends: 2069 [2021-04-15 05:03:50,299 INFO L226 Difference]: Without dead ends: 2054 [2021-04-15 05:03:50,300 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 3409.5ms TimeCoverageRelationStatistics Valid=326, Invalid=1480, Unknown=0, NotChecked=0, Total=1806 [2021-04-15 05:03:50,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2054 states. [2021-04-15 05:03:50,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2054 to 1442. [2021-04-15 05:03:50,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 3.3213046495489245) internal successors, (4786), 1441 states have internal predecessors, (4786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:03:50,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 4786 transitions. [2021-04-15 05:03:50,322 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 4786 transitions. Word has length 26 [2021-04-15 05:03:50,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:03:50,322 INFO L480 AbstractCegarLoop]: Abstraction has 1442 states and 4786 transitions. [2021-04-15 05:03:50,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:03:50,322 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 4786 transitions. [2021-04-15 05:03:50,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:03:50,324 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:03:50,324 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:03:50,524 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable571,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:03:50,525 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:03:50,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:03:50,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1219202938, now seen corresponding path program 39 times [2021-04-15 05:03:50,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:03:50,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579944140] [2021-04-15 05:03:50,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:03:50,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:03:50,877 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2021-04-15 05:03:51,169 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:03:51,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579944140] [2021-04-15 05:03:51,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674912966] [2021-04-15 05:03:51,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 05:03:51,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 05:03:51,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:03:51,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:03:51,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:03:51,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:51,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:51,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:51,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:51,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:51,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:51,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-04-15 05:03:51,875 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:51,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:51,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:51,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:51,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:51,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:51,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:51,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-04-15 05:03:51,886 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:51,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:51,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:51,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:51,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:51,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:51,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:51,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-04-15 05:03:51,897 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:51,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:51,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:51,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:51,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:51,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:51,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:51,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-04-15 05:03:51,908 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:51,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:51,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:51,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:51,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:51,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:51,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:51,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-04-15 05:03:51,919 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:51,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:51,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:51,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:51,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:51,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:51,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:51,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-04-15 05:03:51,931 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:51,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:51,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:51,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:51,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:51,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:51,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:51,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-04-15 05:03:51,943 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:51,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:51,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:51,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:51,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:51,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:51,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:51,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-04-15 05:03:51,957 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:51,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:51,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:51,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:51,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:51,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:51,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:51,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-04-15 05:03:51,968 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:51,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:51,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:51,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:51,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:51,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:51,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:51,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-04-15 05:03:51,980 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:51,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:51,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:51,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:51,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:51,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:51,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:51,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-04-15 05:03:51,989 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:51,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:51,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:51,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:51,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:51,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:51,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:51,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-04-15 05:03:52,002 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:52,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:52,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:52,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:52,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:52,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:52,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:52,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-04-15 05:03:52,012 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:52,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:52,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:52,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:52,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:52,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:52,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:52,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-04-15 05:03:52,022 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:52,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:52,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:52,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:52,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:52,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-04-15 05:03:52,027 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:52,058 INFO L628 ElimStorePlain]: treesize reduction 32, result has 45.8 percent of original size [2021-04-15 05:03:52,060 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 05:03:52,060 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-04-15 05:03:52,088 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:03:52,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:03:52,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-04-15 05:03:52,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020615410] [2021-04-15 05:03:52,089 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:03:52,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:03:52,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:03:52,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:03:52,090 INFO L87 Difference]: Start difference. First operand 1442 states and 4786 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:03:52,604 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 58 [2021-04-15 05:03:53,146 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 67 [2021-04-15 05:03:53,383 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2021-04-15 05:03:53,842 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 61 [2021-04-15 05:03:54,068 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2021-04-15 05:03:54,214 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2021-04-15 05:03:54,668 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 65 [2021-04-15 05:03:55,417 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 51 [2021-04-15 05:03:55,575 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 60 [2021-04-15 05:03:55,881 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-04-15 05:03:56,211 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 52 [2021-04-15 05:03:56,420 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 51 [2021-04-15 05:03:57,146 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-04-15 05:03:57,321 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2021-04-15 05:03:57,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:03:57,666 INFO L93 Difference]: Finished difference Result 2538 states and 7861 transitions. [2021-04-15 05:03:57,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-04-15 05:03:57,666 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:03:57,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:03:57,671 INFO L225 Difference]: With dead ends: 2538 [2021-04-15 05:03:57,671 INFO L226 Difference]: Without dead ends: 2493 [2021-04-15 05:03:57,671 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1407 ImplicationChecksByTransitivity, 5285.4ms TimeCoverageRelationStatistics Valid=698, Invalid=3592, Unknown=0, NotChecked=0, Total=4290 [2021-04-15 05:03:57,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2493 states. [2021-04-15 05:03:57,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2493 to 1453. [2021-04-15 05:03:57,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1453 states, 1452 states have (on average 3.331267217630854) internal successors, (4837), 1452 states have internal predecessors, (4837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:03:57,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1453 states to 1453 states and 4837 transitions. [2021-04-15 05:03:57,699 INFO L78 Accepts]: Start accepts. Automaton has 1453 states and 4837 transitions. Word has length 26 [2021-04-15 05:03:57,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:03:57,699 INFO L480 AbstractCegarLoop]: Abstraction has 1453 states and 4837 transitions. [2021-04-15 05:03:57,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:03:57,699 INFO L276 IsEmpty]: Start isEmpty. Operand 1453 states and 4837 transitions. [2021-04-15 05:03:57,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:03:57,701 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:03:57,702 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:03:57,902 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable588 [2021-04-15 05:03:57,902 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:03:57,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:03:57,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1873451990, now seen corresponding path program 40 times [2021-04-15 05:03:57,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:03:57,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107680603] [2021-04-15 05:03:57,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:03:57,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:03:58,449 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:03:58,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107680603] [2021-04-15 05:03:58,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064991458] [2021-04-15 05:03:58,450 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 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 [2021-04-15 05:03:58,472 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:03:58,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:03:58,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:03:58,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:03:59,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:59,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:59,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:59,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:59,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:59,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-04-15 05:03:59,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:59,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:59,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:59,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:59,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:59,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:59,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-04-15 05:03:59,171 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:59,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:59,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:59,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:59,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:59,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:59,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-04-15 05:03:59,184 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:59,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:59,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:59,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:59,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:59,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:59,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-04-15 05:03:59,197 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:59,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:59,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:59,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:59,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:59,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:59,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-04-15 05:03:59,209 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:59,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:59,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:59,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:59,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:59,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:59,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-04-15 05:03:59,221 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:59,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:59,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:59,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:59,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:59,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:59,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-04-15 05:03:59,233 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:59,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:59,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:59,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:59,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:59,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:59,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-04-15 05:03:59,244 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:59,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:59,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:59,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:59,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:59,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:59,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-04-15 05:03:59,256 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:59,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:59,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:59,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:59,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:59,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:59,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-04-15 05:03:59,269 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:59,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:59,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:59,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:59,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:59,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:59,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-04-15 05:03:59,281 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:59,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:59,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:59,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:59,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:59,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:59,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-04-15 05:03:59,293 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:59,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:59,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:59,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:59,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:59,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:59,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-04-15 05:03:59,304 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:59,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:59,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:59,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:59,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:59,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:59,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-04-15 05:03:59,314 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:59,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:03:59,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:59,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:03:59,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-04-15 05:03:59,320 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:03:59,358 INFO L628 ElimStorePlain]: treesize reduction 32, result has 45.8 percent of original size [2021-04-15 05:03:59,360 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 05:03:59,360 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-04-15 05:03:59,393 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:03:59,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:03:59,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-04-15 05:03:59,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024912345] [2021-04-15 05:03:59,394 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:03:59,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:03:59,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:03:59,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:03:59,394 INFO L87 Difference]: Start difference. First operand 1453 states and 4837 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:03:59,927 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2021-04-15 05:04:00,341 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 63 [2021-04-15 05:04:00,568 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2021-04-15 05:04:00,928 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2021-04-15 05:04:01,158 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-04-15 05:04:01,519 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 65 [2021-04-15 05:04:02,021 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 59 [2021-04-15 05:04:03,246 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-04-15 05:04:03,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:04:03,467 INFO L93 Difference]: Finished difference Result 2460 states and 7663 transitions. [2021-04-15 05:04:03,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-04-15 05:04:03,467 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:04:03,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:04:03,471 INFO L225 Difference]: With dead ends: 2460 [2021-04-15 05:04:03,471 INFO L226 Difference]: Without dead ends: 2415 [2021-04-15 05:04:03,472 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1019 ImplicationChecksByTransitivity, 3942.6ms TimeCoverageRelationStatistics Valid=580, Invalid=2612, Unknown=0, NotChecked=0, Total=3192 [2021-04-15 05:04:03,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2415 states. [2021-04-15 05:04:03,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2415 to 1453. [2021-04-15 05:04:03,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1453 states, 1452 states have (on average 3.331955922865014) internal successors, (4838), 1452 states have internal predecessors, (4838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:04:03,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1453 states to 1453 states and 4838 transitions. [2021-04-15 05:04:03,493 INFO L78 Accepts]: Start accepts. Automaton has 1453 states and 4838 transitions. Word has length 26 [2021-04-15 05:04:03,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:04:03,493 INFO L480 AbstractCegarLoop]: Abstraction has 1453 states and 4838 transitions. [2021-04-15 05:04:03,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:04:03,493 INFO L276 IsEmpty]: Start isEmpty. Operand 1453 states and 4838 transitions. [2021-04-15 05:04:03,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:04:03,496 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:04:03,496 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:04:03,696 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable678 [2021-04-15 05:04:03,696 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:04:03,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:04:03,697 INFO L82 PathProgramCache]: Analyzing trace with hash -39803338, now seen corresponding path program 41 times [2021-04-15 05:04:03,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:04:03,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999750004] [2021-04-15 05:04:03,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:04:03,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:04:04,057 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 46 [2021-04-15 05:04:04,345 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:04:04,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999750004] [2021-04-15 05:04:04,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380288200] [2021-04-15 05:04:04,346 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 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 [2021-04-15 05:04:04,368 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 05:04:04,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:04:04,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:04:04,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:04:04,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:04,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:05,010 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-04-15 05:04:05,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-04-15 05:04:05,017 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:05,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:05,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:05,054 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:04:05,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-04-15 05:04:05,063 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:05,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:05,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:05,115 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-04-15 05:04:05,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 43 [2021-04-15 05:04:05,121 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:05,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:05,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:05,162 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-04-15 05:04:05,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 28 [2021-04-15 05:04:05,164 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:05,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:05,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:05,191 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-04-15 05:04:05,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-04-15 05:04:05,192 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:05,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:05,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:05,234 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-04-15 05:04:05,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 1 [2021-04-15 05:04:05,236 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:05,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:05,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:05,271 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-04-15 05:04:05,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 28 [2021-04-15 05:04:05,274 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:05,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:05,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:05,302 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-04-15 05:04:05,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-04-15 05:04:05,305 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:05,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:05,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:05,331 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-04-15 05:04:05,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-04-15 05:04:05,332 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:05,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:05,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:05,357 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-04-15 05:04:05,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-04-15 05:04:05,359 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:05,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:05,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:05,385 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-04-15 05:04:05,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-04-15 05:04:05,386 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:05,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:05,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:05,423 INFO L354 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2021-04-15 05:04:05,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 23 [2021-04-15 05:04:05,427 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:05,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:05,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:05,452 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-04-15 05:04:05,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-04-15 05:04:05,453 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:05,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:05,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:05,478 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-04-15 05:04:05,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-04-15 05:04:05,479 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:05,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:05,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:05,503 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-04-15 05:04:05,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-04-15 05:04:05,504 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:05,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:05,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:05,519 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-04-15 05:04:05,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-04-15 05:04:05,520 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:05,704 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-04-15 05:04:05,704 INFO L628 ElimStorePlain]: treesize reduction 39, result has 73.5 percent of original size [2021-04-15 05:04:05,706 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-04-15 05:04:05,706 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:761, output treesize:90 [2021-04-15 05:04:05,826 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:04:05,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:04:05,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-04-15 05:04:05,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334650265] [2021-04-15 05:04:05,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 05:04:05,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:04:05,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 05:04:05,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:04:05,827 INFO L87 Difference]: Start difference. First operand 1453 states and 4838 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:04:06,277 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 43 [2021-04-15 05:04:06,479 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2021-04-15 05:04:06,623 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2021-04-15 05:04:07,210 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 67 [2021-04-15 05:04:07,461 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2021-04-15 05:04:08,032 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2021-04-15 05:04:08,316 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 59 [2021-04-15 05:04:08,460 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-04-15 05:04:08,800 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 67 [2021-04-15 05:04:09,302 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 53 [2021-04-15 05:04:09,634 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 58 [2021-04-15 05:04:10,250 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 48 [2021-04-15 05:04:10,540 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 46 [2021-04-15 05:04:10,733 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 42 [2021-04-15 05:04:11,108 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 48 [2021-04-15 05:04:11,385 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 40 [2021-04-15 05:04:11,861 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2021-04-15 05:04:12,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:04:12,175 INFO L93 Difference]: Finished difference Result 3397 states and 10519 transitions. [2021-04-15 05:04:12,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-04-15 05:04:12,175 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:04:12,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:04:12,181 INFO L225 Difference]: With dead ends: 3397 [2021-04-15 05:04:12,181 INFO L226 Difference]: Without dead ends: 3337 [2021-04-15 05:04:12,181 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1371 ImplicationChecksByTransitivity, 6054.6ms TimeCoverageRelationStatistics Valid=834, Invalid=3456, Unknown=0, NotChecked=0, Total=4290 [2021-04-15 05:04:12,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3337 states. [2021-04-15 05:04:12,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3337 to 1474. [2021-04-15 05:04:12,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1474 states, 1473 states have (on average 3.351663272233537) internal successors, (4937), 1473 states have internal predecessors, (4937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:04:12,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 4937 transitions. [2021-04-15 05:04:12,207 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 4937 transitions. Word has length 26 [2021-04-15 05:04:12,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:04:12,207 INFO L480 AbstractCegarLoop]: Abstraction has 1474 states and 4937 transitions. [2021-04-15 05:04:12,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:04:12,207 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 4937 transitions. [2021-04-15 05:04:12,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:04:12,209 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:04:12,209 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:04:12,410 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable768 [2021-04-15 05:04:12,410 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:04:12,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:04:12,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1882815202, now seen corresponding path program 13 times [2021-04-15 05:04:12,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:04:12,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679111721] [2021-04-15 05:04:12,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:04:12,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:04:12,741 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 30 [2021-04-15 05:04:13,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:04:13,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679111721] [2021-04-15 05:04:13,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745388819] [2021-04-15 05:04:13,037 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 05:04:13,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:04:13,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:04:13,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:04:13,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:13,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:04:13,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:04:13,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-04-15 05:04:13,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:13,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:13,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:04:13,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:04:13,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:04:13,524 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:13,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:13,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:04:13,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:04:13,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:04:13,531 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:13,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:13,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:04:13,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:04:13,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-04-15 05:04:13,538 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:13,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:13,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:04:13,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:04:13,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-04-15 05:04:13,545 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:13,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:13,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:04:13,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:04:13,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:04:13,554 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:13,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:13,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:04:13,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:04:13,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:04:13,577 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:13,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:13,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:04:13,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:04:13,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:04:13,584 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:13,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:13,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:04:13,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:04:13,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:04:13,591 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:13,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:13,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:04:13,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:04:13,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-04-15 05:04:13,599 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:13,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:13,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:04:13,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:04:13,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-04-15 05:04:13,606 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:13,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:13,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:04:13,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:04:13,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:04:13,615 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:13,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:13,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:04:13,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:04:13,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-04-15 05:04:13,622 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:13,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:13,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:04:13,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:04:13,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:04:13,628 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:13,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:13,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:04:13,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-04-15 05:04:13,637 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:13,726 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-04-15 05:04:13,728 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-04-15 05:04:13,728 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-04-15 05:04:13,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:04:13,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:04:13,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-04-15 05:04:13,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404221707] [2021-04-15 05:04:13,789 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:04:13,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:04:13,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:04:13,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:04:13,790 INFO L87 Difference]: Start difference. First operand 1474 states and 4937 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:04:14,359 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2021-04-15 05:04:14,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:04:14,827 INFO L93 Difference]: Finished difference Result 1857 states and 6096 transitions. [2021-04-15 05:04:14,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 05:04:14,827 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:04:14,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:04:14,831 INFO L225 Difference]: With dead ends: 1857 [2021-04-15 05:04:14,831 INFO L226 Difference]: Without dead ends: 1842 [2021-04-15 05:04:14,831 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1458.7ms TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2021-04-15 05:04:14,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1842 states. [2021-04-15 05:04:14,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1842 to 1474. [2021-04-15 05:04:14,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1474 states, 1473 states have (on average 3.351663272233537) internal successors, (4937), 1473 states have internal predecessors, (4937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:04:14,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 4937 transitions. [2021-04-15 05:04:14,853 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 4937 transitions. Word has length 26 [2021-04-15 05:04:14,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:04:14,853 INFO L480 AbstractCegarLoop]: Abstraction has 1474 states and 4937 transitions. [2021-04-15 05:04:14,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:04:14,853 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 4937 transitions. [2021-04-15 05:04:14,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:04:14,855 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:04:14,855 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:04:15,056 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable867,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:04:15,056 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:04:15,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:04:15,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1721464722, now seen corresponding path program 14 times [2021-04-15 05:04:15,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:04:15,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564839881] [2021-04-15 05:04:15,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:04:15,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:04:15,623 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:04:15,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564839881] [2021-04-15 05:04:15,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653140645] [2021-04-15 05:04:15,623 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 [2021-04-15 05:04:15,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:04:15,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:04:15,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-04-15 05:04:15,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:04:16,298 INFO L354 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2021-04-15 05:04:16,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 39 [2021-04-15 05:04:16,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:16,332 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-04-15 05:04:16,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 28 [2021-04-15 05:04:16,334 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:16,527 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-04-15 05:04:16,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:04:16,561 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-04-15 05:04:16,561 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 21 treesize of output 29 [2021-04-15 05:04:16,565 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:16,588 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:04:16,589 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 34 [2021-04-15 05:04:16,597 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:16,777 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-04-15 05:04:16,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:04:16,810 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-04-15 05:04:16,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-04-15 05:04:16,812 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:16,853 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-04-15 05:04:16,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 29 [2021-04-15 05:04:16,857 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:17,040 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-04-15 05:04:17,041 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:04:17,074 INFO L354 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2021-04-15 05:04:17,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 36 [2021-04-15 05:04:17,082 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:17,108 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:04:17,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 43 [2021-04-15 05:04:17,112 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:17,488 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2021-04-15 05:04:17,488 INFO L628 ElimStorePlain]: treesize reduction 17, result has 94.5 percent of original size [2021-04-15 05:04:17,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-04-15 05:04:17,548 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:365, output treesize:820 [2021-04-15 05:04:18,098 WARN L205 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 78 [2021-04-15 05:04:18,430 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-04-15 05:04:18,594 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:04:18,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:04:18,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-04-15 05:04:18,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413168888] [2021-04-15 05:04:18,594 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 05:04:18,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:04:18,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 05:04:18,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:04:18,595 INFO L87 Difference]: Start difference. First operand 1474 states and 4937 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:04:18,794 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 22 [2021-04-15 05:04:18,952 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 28 [2021-04-15 05:04:19,432 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 50 [2021-04-15 05:04:20,049 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 41 [2021-04-15 05:04:20,337 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 39 [2021-04-15 05:04:20,620 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-04-15 05:04:21,133 WARN L205 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 50 [2021-04-15 05:04:21,589 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 62 [2021-04-15 05:04:22,096 WARN L205 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 69 [2021-04-15 05:04:22,526 WARN L205 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 49 [2021-04-15 05:04:22,872 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 47 [2021-04-15 05:04:23,447 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2021-04-15 05:04:23,957 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2021-04-15 05:04:24,591 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 60 [2021-04-15 05:04:25,371 WARN L205 SmtUtils]: Spent 745.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 90 [2021-04-15 05:04:25,747 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 44 [2021-04-15 05:04:26,381 WARN L205 SmtUtils]: Spent 594.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 70 [2021-04-15 05:04:26,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:04:26,488 INFO L93 Difference]: Finished difference Result 2117 states and 6795 transitions. [2021-04-15 05:04:26,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 05:04:26,489 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:04:26,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:04:26,492 INFO L225 Difference]: With dead ends: 2117 [2021-04-15 05:04:26,492 INFO L226 Difference]: Without dead ends: 2102 [2021-04-15 05:04:26,492 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 8475.4ms TimeCoverageRelationStatistics Valid=280, Invalid=1526, Unknown=0, NotChecked=0, Total=1806 [2021-04-15 05:04:26,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2102 states. [2021-04-15 05:04:26,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2102 to 1478. [2021-04-15 05:04:26,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1478 states, 1477 states have (on average 3.3568043331076507) internal successors, (4958), 1477 states have internal predecessors, (4958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:04:26,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1478 states to 1478 states and 4958 transitions. [2021-04-15 05:04:26,520 INFO L78 Accepts]: Start accepts. Automaton has 1478 states and 4958 transitions. Word has length 26 [2021-04-15 05:04:26,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:04:26,520 INFO L480 AbstractCegarLoop]: Abstraction has 1478 states and 4958 transitions. [2021-04-15 05:04:26,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:04:26,520 INFO L276 IsEmpty]: Start isEmpty. Operand 1478 states and 4958 transitions. [2021-04-15 05:04:26,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:04:26,523 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:04:26,523 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:04:26,736 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable897,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:04:26,737 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:04:26,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:04:26,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1741432748, now seen corresponding path program 15 times [2021-04-15 05:04:26,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:04:26,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287875555] [2021-04-15 05:04:26,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:04:26,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:04:27,152 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-04-15 05:04:27,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:04:27,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287875555] [2021-04-15 05:04:27,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173184192] [2021-04-15 05:04:27,346 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 [2021-04-15 05:04:27,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 05:04:27,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:04:27,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-04-15 05:04:27,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:04:27,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:27,811 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:04:27,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-04-15 05:04:27,812 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:27,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:27,826 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:04:27,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-04-15 05:04:27,828 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:27,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:27,841 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:04:27,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-04-15 05:04:27,846 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:27,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:27,857 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:04:27,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:04:27,858 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:27,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:27,870 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:04:27,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-04-15 05:04:27,871 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:27,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:27,885 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:04:27,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-04-15 05:04:27,887 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:27,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:27,897 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:04:27,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-04-15 05:04:27,898 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:27,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:27,909 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:04:27,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:04:27,910 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:27,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:27,927 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:04:27,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-04-15 05:04:27,928 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:27,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:27,939 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:04:27,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-04-15 05:04:27,940 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:27,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:27,954 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:04:27,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-04-15 05:04:27,970 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:27,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:27,992 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:04:27,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-04-15 05:04:27,993 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:27,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:28,007 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:04:28,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-04-15 05:04:28,012 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:28,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:28,025 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:04:28,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-04-15 05:04:28,027 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:28,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:28,037 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:04:28,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:04:28,038 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:28,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:28,044 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:04:28,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:04:28,045 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:28,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:04:28,163 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-04-15 05:04:28,164 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:657, output treesize:174 [2021-04-15 05:04:28,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:04:28,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:04:28,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-04-15 05:04:28,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168290885] [2021-04-15 05:04:28,404 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:04:28,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:04:28,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:04:28,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:04:28,404 INFO L87 Difference]: Start difference. First operand 1478 states and 4958 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:04:29,239 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2021-04-15 05:04:29,438 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 40 [2021-04-15 05:04:29,596 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 35 [2021-04-15 05:04:29,794 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2021-04-15 05:04:30,062 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2021-04-15 05:04:30,652 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2021-04-15 05:04:30,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:04:30,724 INFO L93 Difference]: Finished difference Result 2018 states and 6612 transitions. [2021-04-15 05:04:30,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 05:04:30,724 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:04:30,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:04:30,728 INFO L225 Difference]: With dead ends: 2018 [2021-04-15 05:04:30,728 INFO L226 Difference]: Without dead ends: 2003 [2021-04-15 05:04:30,728 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 2752.5ms TimeCoverageRelationStatistics Valid=185, Invalid=807, Unknown=0, NotChecked=0, Total=992 [2021-04-15 05:04:30,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2003 states. [2021-04-15 05:04:30,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2003 to 1475. [2021-04-15 05:04:30,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1475 states, 1474 states have (on average 3.3534599728629577) internal successors, (4943), 1474 states have internal predecessors, (4943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:04:30,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1475 states to 1475 states and 4943 transitions. [2021-04-15 05:04:30,748 INFO L78 Accepts]: Start accepts. Automaton has 1475 states and 4943 transitions. Word has length 26 [2021-04-15 05:04:30,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:04:30,748 INFO L480 AbstractCegarLoop]: Abstraction has 1475 states and 4943 transitions. [2021-04-15 05:04:30,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:04:30,748 INFO L276 IsEmpty]: Start isEmpty. Operand 1475 states and 4943 transitions. [2021-04-15 05:04:30,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:04:30,750 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:04:30,750 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:04:30,964 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable977,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:04:30,965 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:04:30,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:04:30,965 INFO L82 PathProgramCache]: Analyzing trace with hash 9265186, now seen corresponding path program 16 times [2021-04-15 05:04:30,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:04:30,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705157108] [2021-04-15 05:04:30,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:04:30,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:04:31,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:04:31,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705157108] [2021-04-15 05:04:31,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063555] [2021-04-15 05:04:31,490 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 [2021-04-15 05:04:31,512 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:04:31,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:04:31,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-04-15 05:04:31,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:04:31,883 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-04-15 05:04:32,102 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 55 [2021-04-15 05:04:32,189 INFO L446 ElimStorePlain]: Different costs {1=[A], 2=[v_prenex_46, v_prenex_45]} [2021-04-15 05:04:32,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:32,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-04-15 05:04:32,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:32,334 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-04-15 05:04:32,334 INFO L628 ElimStorePlain]: treesize reduction 54, result has 69.8 percent of original size [2021-04-15 05:04:32,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:32,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:04:32,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:04:32,340 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:32,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:04:32,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:32,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:04:32,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:04:32,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:04:32,406 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:32,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:32,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:04:32,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-04-15 05:04:32,411 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:32,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:04:32,461 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-04-15 05:04:32,461 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:193, output treesize:51 [2021-04-15 05:04:32,535 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:04:32,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:04:32,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-04-15 05:04:32,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313725329] [2021-04-15 05:04:32,536 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:04:32,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:04:32,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:04:32,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:04:32,537 INFO L87 Difference]: Start difference. First operand 1475 states and 4943 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:04:32,879 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2021-04-15 05:04:33,367 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 42 [2021-04-15 05:04:33,743 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-04-15 05:04:34,005 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-04-15 05:04:34,482 WARN L205 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 64 [2021-04-15 05:04:34,903 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 64 [2021-04-15 05:04:35,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:04:35,100 INFO L93 Difference]: Finished difference Result 2004 states and 6582 transitions. [2021-04-15 05:04:35,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 05:04:35,101 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:04:35,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:04:35,105 INFO L225 Difference]: With dead ends: 2004 [2021-04-15 05:04:35,105 INFO L226 Difference]: Without dead ends: 1989 [2021-04-15 05:04:35,105 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 2925.2ms TimeCoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2021-04-15 05:04:35,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1989 states. [2021-04-15 05:04:35,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1989 to 1478. [2021-04-15 05:04:35,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1478 states, 1477 states have (on average 3.3547731888964116) internal successors, (4955), 1477 states have internal predecessors, (4955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:04:35,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1478 states to 1478 states and 4955 transitions. [2021-04-15 05:04:35,128 INFO L78 Accepts]: Start accepts. Automaton has 1478 states and 4955 transitions. Word has length 26 [2021-04-15 05:04:35,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:04:35,128 INFO L480 AbstractCegarLoop]: Abstraction has 1478 states and 4955 transitions. [2021-04-15 05:04:35,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:04:35,128 INFO L276 IsEmpty]: Start isEmpty. Operand 1478 states and 4955 transitions. [2021-04-15 05:04:35,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:04:35,130 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:04:35,130 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:04:35,331 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1018,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:04:35,331 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:04:35,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:04:35,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1608267594, now seen corresponding path program 17 times [2021-04-15 05:04:35,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:04:35,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913446785] [2021-04-15 05:04:35,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:04:35,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:04:35,797 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2021-04-15 05:04:35,898 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:04:35,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913446785] [2021-04-15 05:04:35,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073321101] [2021-04-15 05:04:35,898 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) [2021-04-15 05:04:35,934 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 05:04:35,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:04:35,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-04-15 05:04:35,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:04:36,422 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-04-15 05:04:36,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:36,491 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:04:36,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-04-15 05:04:36,492 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:36,634 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-04-15 05:04:36,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:04:36,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:36,651 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:04:36,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-04-15 05:04:36,652 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:36,794 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-04-15 05:04:36,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:04:36,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:36,812 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:04:36,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-04-15 05:04:36,814 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:36,961 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-04-15 05:04:36,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:04:36,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:36,976 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:04:36,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-04-15 05:04:36,978 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:37,117 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-04-15 05:04:37,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:04:37,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:37,131 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:04:37,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-04-15 05:04:37,136 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:37,267 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-04-15 05:04:37,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:04:37,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:37,281 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:04:37,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-04-15 05:04:37,286 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:37,408 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-04-15 05:04:37,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:04:37,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:37,423 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:04:37,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-04-15 05:04:37,426 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:37,545 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-04-15 05:04:37,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:04:37,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:37,563 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:04:37,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-04-15 05:04:37,566 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:37,679 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-04-15 05:04:37,680 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:04:37,686 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-04-15 05:04:37,686 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:309, output treesize:174 [2021-04-15 05:04:37,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:04:37,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:04:37,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-04-15 05:04:37,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961482410] [2021-04-15 05:04:37,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 05:04:37,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:04:37,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 05:04:37,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:04:37,927 INFO L87 Difference]: Start difference. First operand 1478 states and 4955 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:04:38,170 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 27 [2021-04-15 05:04:38,440 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 38 [2021-04-15 05:04:38,585 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 40 [2021-04-15 05:04:39,064 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 41 [2021-04-15 05:04:39,329 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 54 [2021-04-15 05:04:39,598 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 47 [2021-04-15 05:04:39,872 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 45 [2021-04-15 05:04:40,070 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-04-15 05:04:40,516 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-04-15 05:04:41,232 WARN L205 SmtUtils]: Spent 679.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 64 [2021-04-15 05:04:41,593 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2021-04-15 05:04:41,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:04:41,739 INFO L93 Difference]: Finished difference Result 2074 states and 6746 transitions. [2021-04-15 05:04:41,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 05:04:41,740 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:04:41,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:04:41,743 INFO L225 Difference]: With dead ends: 2074 [2021-04-15 05:04:41,743 INFO L226 Difference]: Without dead ends: 2044 [2021-04-15 05:04:41,743 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 4225.9ms TimeCoverageRelationStatistics Valid=274, Invalid=1286, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 05:04:41,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2044 states. [2021-04-15 05:04:41,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2044 to 1472. [2021-04-15 05:04:41,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1472 states, 1471 states have (on average 3.352141400407886) internal successors, (4931), 1471 states have internal predecessors, (4931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:04:41,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1472 states to 1472 states and 4931 transitions. [2021-04-15 05:04:41,762 INFO L78 Accepts]: Start accepts. Automaton has 1472 states and 4931 transitions. Word has length 26 [2021-04-15 05:04:41,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:04:41,762 INFO L480 AbstractCegarLoop]: Abstraction has 1472 states and 4931 transitions. [2021-04-15 05:04:41,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:04:41,763 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states and 4931 transitions. [2021-04-15 05:04:41,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:04:41,764 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:04:41,765 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:04:41,965 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1027 [2021-04-15 05:04:41,965 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:04:41,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:04:41,965 INFO L82 PathProgramCache]: Analyzing trace with hash -2091148486, now seen corresponding path program 18 times [2021-04-15 05:04:41,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:04:41,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374787735] [2021-04-15 05:04:41,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:04:41,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:04:42,505 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:04:42,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374787735] [2021-04-15 05:04:42,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846806143] [2021-04-15 05:04:42,505 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 [2021-04-15 05:04:42,528 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 05:04:42,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:04:42,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:04:42,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:04:42,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:42,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:04:42,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:04:42,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:04:42,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:42,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:42,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:04:42,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:04:42,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-04-15 05:04:42,990 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:42,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:42,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:04:42,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:04:42,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-04-15 05:04:42,998 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:43,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:43,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:04:43,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:04:43,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:04:43,007 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:43,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:43,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:04:43,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:04:43,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:04:43,016 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:43,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:43,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:04:43,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:04:43,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-04-15 05:04:43,026 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:43,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:43,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:04:43,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:04:43,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:04:43,034 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:43,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:43,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:04:43,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:04:43,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-04-15 05:04:43,042 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:43,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:43,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:04:43,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:04:43,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-04-15 05:04:43,051 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:43,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:43,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:04:43,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:04:43,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:04:43,059 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:43,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:43,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:04:43,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:04:43,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-04-15 05:04:43,069 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:43,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:43,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:04:43,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:04:43,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:04:43,079 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:43,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:43,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:04:43,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:04:43,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:04:43,087 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:43,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:43,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:04:43,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:04:43,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-04-15 05:04:43,095 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:43,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:43,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:04:43,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:04:43,100 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:43,193 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-04-15 05:04:43,195 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-04-15 05:04:43,195 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-04-15 05:04:43,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:04:43,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:04:43,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-04-15 05:04:43,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913226235] [2021-04-15 05:04:43,263 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:04:43,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:04:43,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:04:43,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:04:43,264 INFO L87 Difference]: Start difference. First operand 1472 states and 4931 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:04:43,498 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 26 [2021-04-15 05:04:44,518 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-04-15 05:04:44,695 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-04-15 05:04:45,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:04:45,013 INFO L93 Difference]: Finished difference Result 1963 states and 6392 transitions. [2021-04-15 05:04:45,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 05:04:45,014 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:04:45,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:04:45,017 INFO L225 Difference]: With dead ends: 1963 [2021-04-15 05:04:45,017 INFO L226 Difference]: Without dead ends: 1938 [2021-04-15 05:04:45,018 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 2043.4ms TimeCoverageRelationStatistics Valid=185, Invalid=871, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 05:04:45,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1938 states. [2021-04-15 05:04:45,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1938 to 1507. [2021-04-15 05:04:45,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1507 states, 1506 states have (on average 3.347941567065073) internal successors, (5042), 1506 states have internal predecessors, (5042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:04:45,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1507 states to 1507 states and 5042 transitions. [2021-04-15 05:04:45,047 INFO L78 Accepts]: Start accepts. Automaton has 1507 states and 5042 transitions. Word has length 26 [2021-04-15 05:04:45,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:04:45,048 INFO L480 AbstractCegarLoop]: Abstraction has 1507 states and 5042 transitions. [2021-04-15 05:04:45,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:04:45,048 INFO L276 IsEmpty]: Start isEmpty. Operand 1507 states and 5042 transitions. [2021-04-15 05:04:45,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:04:45,051 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:04:45,051 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:04:45,272 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1042,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:04:45,273 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:04:45,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:04:45,273 INFO L82 PathProgramCache]: Analyzing trace with hash -31506310, now seen corresponding path program 19 times [2021-04-15 05:04:45,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:04:45,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648908244] [2021-04-15 05:04:45,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:04:45,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:04:45,733 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:04:45,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648908244] [2021-04-15 05:04:45,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405566769] [2021-04-15 05:04:45,733 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 [2021-04-15 05:04:45,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:04:45,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:04:45,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:04:46,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:46,124 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:04:46,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-04-15 05:04:46,128 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:46,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:46,139 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:04:46,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:04:46,140 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:46,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:46,155 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:04:46,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-04-15 05:04:46,157 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:46,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:46,168 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:04:46,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-04-15 05:04:46,169 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:46,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:46,184 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:04:46,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-04-15 05:04:46,186 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:46,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:46,200 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:04:46,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-04-15 05:04:46,205 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:46,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:46,220 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:04:46,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-04-15 05:04:46,222 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:46,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:46,236 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:04:46,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-04-15 05:04:46,237 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:46,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:46,248 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:04:46,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:04:46,249 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:46,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:46,262 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:04:46,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:04:46,263 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:46,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:46,275 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:04:46,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-04-15 05:04:46,276 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:46,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:46,288 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:04:46,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:04:46,290 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:46,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:46,306 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:04:46,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-04-15 05:04:46,307 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:46,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:46,319 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:04:46,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-04-15 05:04:46,320 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:46,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:46,334 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:04:46,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-04-15 05:04:46,337 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:46,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:46,348 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:04:46,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-04-15 05:04:46,350 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:46,459 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-04-15 05:04:46,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:04:46,464 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-04-15 05:04:46,464 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:689, output treesize:174 [2021-04-15 05:04:46,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:04:46,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:04:46,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-04-15 05:04:46,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988823955] [2021-04-15 05:04:46,698 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:04:46,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:04:46,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:04:46,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:04:46,699 INFO L87 Difference]: Start difference. First operand 1507 states and 5042 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:04:46,905 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 28 [2021-04-15 05:04:47,898 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-04-15 05:04:48,132 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-04-15 05:04:48,385 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2021-04-15 05:04:48,510 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2021-04-15 05:04:48,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:04:48,596 INFO L93 Difference]: Finished difference Result 2180 states and 7083 transitions. [2021-04-15 05:04:48,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 05:04:48,596 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:04:48,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:04:48,599 INFO L225 Difference]: With dead ends: 2180 [2021-04-15 05:04:48,599 INFO L226 Difference]: Without dead ends: 2155 [2021-04-15 05:04:48,600 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 2084.4ms TimeCoverageRelationStatistics Valid=223, Invalid=833, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 05:04:48,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2155 states. [2021-04-15 05:04:48,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2155 to 1510. [2021-04-15 05:04:48,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1510 states, 1509 states have (on average 3.34857521537442) internal successors, (5053), 1509 states have internal predecessors, (5053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:04:48,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1510 states to 1510 states and 5053 transitions. [2021-04-15 05:04:48,620 INFO L78 Accepts]: Start accepts. Automaton has 1510 states and 5053 transitions. Word has length 26 [2021-04-15 05:04:48,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:04:48,620 INFO L480 AbstractCegarLoop]: Abstraction has 1510 states and 5053 transitions. [2021-04-15 05:04:48,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:04:48,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1510 states and 5053 transitions. [2021-04-15 05:04:48,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:04:48,622 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:04:48,622 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:04:48,824 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1072 [2021-04-15 05:04:48,825 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:04:48,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:04:48,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1960184130, now seen corresponding path program 20 times [2021-04-15 05:04:48,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:04:48,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304035387] [2021-04-15 05:04:48,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:04:48,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:04:49,053 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2021-04-15 05:04:49,368 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:04:49,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304035387] [2021-04-15 05:04:49,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569546419] [2021-04-15 05:04:49,368 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 [2021-04-15 05:04:49,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:04:49,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:04:49,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-04-15 05:04:49,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:04:49,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:49,804 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:04:49,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-04-15 05:04:49,819 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:49,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:49,847 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:04:49,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-04-15 05:04:49,849 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:50,012 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-04-15 05:04:50,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:04:50,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:50,029 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:04:50,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-04-15 05:04:50,031 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:50,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:50,042 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:04:50,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-04-15 05:04:50,047 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:50,189 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-04-15 05:04:50,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:04:50,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:50,204 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:04:50,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-04-15 05:04:50,209 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:50,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:50,221 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:04:50,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-04-15 05:04:50,224 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:50,354 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-04-15 05:04:50,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:04:50,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:50,369 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:04:50,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-04-15 05:04:50,371 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:50,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:50,382 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:04:50,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-04-15 05:04:50,385 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:50,510 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-04-15 05:04:50,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:04:50,516 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-04-15 05:04:50,516 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:309, output treesize:174 [2021-04-15 05:04:50,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:04:50,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:04:50,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-04-15 05:04:50,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994519212] [2021-04-15 05:04:50,769 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:04:50,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:04:50,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:04:50,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:04:50,770 INFO L87 Difference]: Start difference. First operand 1510 states and 5053 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:04:51,741 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-04-15 05:04:52,104 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2021-04-15 05:04:52,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:04:52,187 INFO L93 Difference]: Finished difference Result 1689 states and 5564 transitions. [2021-04-15 05:04:52,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 05:04:52,188 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:04:52,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:04:52,191 INFO L225 Difference]: With dead ends: 1689 [2021-04-15 05:04:52,191 INFO L226 Difference]: Without dead ends: 1664 [2021-04-15 05:04:52,191 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1819.8ms TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2021-04-15 05:04:52,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1664 states. [2021-04-15 05:04:52,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1664 to 1523. [2021-04-15 05:04:52,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1523 states, 1522 states have (on average 3.354796320630749) internal successors, (5106), 1522 states have internal predecessors, (5106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:04:52,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1523 states to 1523 states and 5106 transitions. [2021-04-15 05:04:52,212 INFO L78 Accepts]: Start accepts. Automaton has 1523 states and 5106 transitions. Word has length 26 [2021-04-15 05:04:52,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:04:52,213 INFO L480 AbstractCegarLoop]: Abstraction has 1523 states and 5106 transitions. [2021-04-15 05:04:52,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:04:52,213 INFO L276 IsEmpty]: Start isEmpty. Operand 1523 states and 5106 transitions. [2021-04-15 05:04:52,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:04:52,216 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:04:52,216 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:04:52,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1109,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:04:52,416 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:04:52,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:04:52,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1800748254, now seen corresponding path program 21 times [2021-04-15 05:04:52,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:04:52,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651266816] [2021-04-15 05:04:52,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:04:52,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:04:52,646 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-04-15 05:04:52,765 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 34 [2021-04-15 05:04:52,982 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:04:52,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651266816] [2021-04-15 05:04:52,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917838792] [2021-04-15 05:04:52,983 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 [2021-04-15 05:04:53,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 05:04:53,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:04:53,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:04:53,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:04:53,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:53,321 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:04:53,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:04:53,322 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:53,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:53,332 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:04:53,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:04:53,333 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:53,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:53,347 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:04:53,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-04-15 05:04:53,349 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:53,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:53,361 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:04:53,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:04:53,362 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:53,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:53,376 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:04:53,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-04-15 05:04:53,378 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:53,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:53,393 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:04:53,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-04-15 05:04:53,394 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:53,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:53,406 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:04:53,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:04:53,409 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:53,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:53,423 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:04:53,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-04-15 05:04:53,425 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:53,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:53,435 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:04:53,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-04-15 05:04:53,436 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:53,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:53,452 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:04:53,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-04-15 05:04:53,457 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:53,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:53,468 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:04:53,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-04-15 05:04:53,469 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:53,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:53,490 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:04:53,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-04-15 05:04:53,493 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:53,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:53,508 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:04:53,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-04-15 05:04:53,509 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:53,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:53,522 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:04:53,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-04-15 05:04:53,527 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:53,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:53,537 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:04:53,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-04-15 05:04:53,538 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:53,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:53,545 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:04:53,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-04-15 05:04:53,546 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:53,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:04:53,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-04-15 05:04:53,639 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-04-15 05:04:53,886 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:04:53,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:04:53,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-04-15 05:04:53,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644926836] [2021-04-15 05:04:53,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:04:53,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:04:53,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:04:53,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:04:53,887 INFO L87 Difference]: Start difference. First operand 1523 states and 5106 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:04:54,635 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 43 [2021-04-15 05:04:54,817 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2021-04-15 05:04:55,322 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2021-04-15 05:04:55,536 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 43 [2021-04-15 05:04:55,828 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-04-15 05:04:56,137 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-04-15 05:04:56,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:04:56,235 INFO L93 Difference]: Finished difference Result 2055 states and 6753 transitions. [2021-04-15 05:04:56,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 05:04:56,236 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:04:56,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:04:56,239 INFO L225 Difference]: With dead ends: 2055 [2021-04-15 05:04:56,239 INFO L226 Difference]: Without dead ends: 2036 [2021-04-15 05:04:56,240 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 2711.2ms TimeCoverageRelationStatistics Valid=191, Invalid=931, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 05:04:56,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2036 states. [2021-04-15 05:04:56,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2036 to 1535. [2021-04-15 05:04:56,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1535 states, 1534 states have (on average 3.3578878748370276) internal successors, (5151), 1534 states have internal predecessors, (5151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:04:56,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 5151 transitions. [2021-04-15 05:04:56,262 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 5151 transitions. Word has length 26 [2021-04-15 05:04:56,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:04:56,262 INFO L480 AbstractCegarLoop]: Abstraction has 1535 states and 5151 transitions. [2021-04-15 05:04:56,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:04:56,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 5151 transitions. [2021-04-15 05:04:56,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:04:56,265 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:04:56,265 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:04:56,465 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1140,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:04:56,466 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:04:56,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:04:56,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1506727430, now seen corresponding path program 22 times [2021-04-15 05:04:56,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:04:56,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129865827] [2021-04-15 05:04:56,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:04:56,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:04:56,694 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-04-15 05:04:56,918 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-04-15 05:04:57,023 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:04:57,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129865827] [2021-04-15 05:04:57,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751257692] [2021-04-15 05:04:57,024 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:04:57,045 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:04:57,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:04:57,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-04-15 05:04:57,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:04:57,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:57,513 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:04:57,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-04-15 05:04:57,515 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:57,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:57,529 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:04:57,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-04-15 05:04:57,531 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:57,694 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-04-15 05:04:57,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:04:57,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:57,711 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:04:57,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-04-15 05:04:57,715 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:57,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:57,729 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:04:57,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-04-15 05:04:57,731 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:57,881 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-04-15 05:04:57,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:04:57,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:57,898 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:04:57,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-04-15 05:04:57,901 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:57,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:57,915 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:04:57,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-04-15 05:04:57,917 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:58,061 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-04-15 05:04:58,061 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:04:58,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:58,077 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:04:58,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-04-15 05:04:58,079 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:58,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:04:58,091 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:04:58,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-04-15 05:04:58,096 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:04:58,222 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-04-15 05:04:58,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:04:58,239 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-04-15 05:04:58,239 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:325, output treesize:174 [2021-04-15 05:04:58,380 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-04-15 05:04:58,554 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:04:58,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:04:58,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-04-15 05:04:58,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846111597] [2021-04-15 05:04:58,555 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:04:58,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:04:58,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:04:58,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:04:58,556 INFO L87 Difference]: Start difference. First operand 1535 states and 5151 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:04:58,781 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 28 [2021-04-15 05:04:59,192 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2021-04-15 05:04:59,394 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-04-15 05:04:59,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:04:59,988 INFO L93 Difference]: Finished difference Result 2036 states and 6692 transitions. [2021-04-15 05:04:59,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 05:04:59,988 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:04:59,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:04:59,992 INFO L225 Difference]: With dead ends: 2036 [2021-04-15 05:04:59,992 INFO L226 Difference]: Without dead ends: 2011 [2021-04-15 05:04:59,992 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1941.6ms TimeCoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2021-04-15 05:04:59,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2011 states. [2021-04-15 05:05:00,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2011 to 1541. [2021-04-15 05:05:00,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1541 states, 1540 states have (on average 3.3564935064935066) internal successors, (5169), 1540 states have internal predecessors, (5169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:05:00,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1541 states to 1541 states and 5169 transitions. [2021-04-15 05:05:00,012 INFO L78 Accepts]: Start accepts. Automaton has 1541 states and 5169 transitions. Word has length 26 [2021-04-15 05:05:00,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:05:00,012 INFO L480 AbstractCegarLoop]: Abstraction has 1541 states and 5169 transitions. [2021-04-15 05:05:00,012 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:05:00,012 INFO L276 IsEmpty]: Start isEmpty. Operand 1541 states and 5169 transitions. [2021-04-15 05:05:00,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:05:00,014 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:05:00,014 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:05:00,214 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1157,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:05:00,214 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:05:00,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:05:00,215 INFO L82 PathProgramCache]: Analyzing trace with hash -132958662, now seen corresponding path program 42 times [2021-04-15 05:05:00,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:05:00,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340587611] [2021-04-15 05:05:00,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:05:00,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:05:00,437 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2021-04-15 05:05:00,556 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-04-15 05:05:00,838 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:05:00,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340587611] [2021-04-15 05:05:00,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799110253] [2021-04-15 05:05:00,839 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:05:00,859 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 05:05:00,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:05:00,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:05:00,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:05:01,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:01,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:01,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:01,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:01,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:01,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-04-15 05:05:01,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:05:01,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:01,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:01,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:01,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:01,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:01,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-04-15 05:05:01,488 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:05:01,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:01,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:01,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:01,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:01,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:01,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-04-15 05:05:01,499 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:05:01,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:01,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:01,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:01,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:01,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:01,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-04-15 05:05:01,514 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:05:01,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:01,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:01,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:01,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:01,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:01,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-04-15 05:05:01,525 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:05:01,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:01,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:01,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:01,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:01,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:01,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-04-15 05:05:01,539 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:05:01,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:01,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:01,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:01,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:01,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:01,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-04-15 05:05:01,550 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:05:01,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:01,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:01,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:01,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:01,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:01,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-04-15 05:05:01,561 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:05:01,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:01,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:01,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:01,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:01,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:01,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-04-15 05:05:01,573 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:05:01,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:01,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:01,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:01,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:01,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:01,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-04-15 05:05:01,584 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:05:01,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:01,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:01,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:01,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:01,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:01,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-04-15 05:05:01,596 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:05:01,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:01,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:01,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:01,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:01,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:01,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-04-15 05:05:01,607 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:05:01,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:01,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:01,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:01,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:01,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:01,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-04-15 05:05:01,619 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:05:01,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:01,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:01,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:01,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:01,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:01,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-04-15 05:05:01,629 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:05:01,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:01,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:01,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:01,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-04-15 05:05:01,635 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:05:01,671 INFO L628 ElimStorePlain]: treesize reduction 16, result has 62.8 percent of original size [2021-04-15 05:05:01,672 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 05:05:01,672 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-04-15 05:05:01,715 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:05:01,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:05:01,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-04-15 05:05:01,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25475913] [2021-04-15 05:05:01,716 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:05:01,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:05:01,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:05:01,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:05:01,716 INFO L87 Difference]: Start difference. First operand 1541 states and 5169 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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) [2021-04-15 05:05:03,118 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-04-15 05:05:03,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:05:03,200 INFO L93 Difference]: Finished difference Result 1988 states and 6491 transitions. [2021-04-15 05:05:03,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 05:05:03,201 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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 26 [2021-04-15 05:05:03,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:05:03,204 INFO L225 Difference]: With dead ends: 1988 [2021-04-15 05:05:03,204 INFO L226 Difference]: Without dead ends: 1962 [2021-04-15 05:05:03,205 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1937.3ms TimeCoverageRelationStatistics Valid=246, Invalid=1014, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 05:05:03,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1962 states. [2021-04-15 05:05:03,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1962 to 1545. [2021-04-15 05:05:03,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1545 states, 1544 states have (on average 3.3542746113989637) internal successors, (5179), 1544 states have internal predecessors, (5179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:05:03,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1545 states to 1545 states and 5179 transitions. [2021-04-15 05:05:03,224 INFO L78 Accepts]: Start accepts. Automaton has 1545 states and 5179 transitions. Word has length 26 [2021-04-15 05:05:03,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:05:03,224 INFO L480 AbstractCegarLoop]: Abstraction has 1545 states and 5179 transitions. [2021-04-15 05:05:03,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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) [2021-04-15 05:05:03,224 INFO L276 IsEmpty]: Start isEmpty. Operand 1545 states and 5179 transitions. [2021-04-15 05:05:03,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:05:03,226 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:05:03,226 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:05:03,427 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1189 [2021-04-15 05:05:03,427 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:05:03,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:05:03,427 INFO L82 PathProgramCache]: Analyzing trace with hash 934915902, now seen corresponding path program 43 times [2021-04-15 05:05:03,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:05:03,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242595502] [2021-04-15 05:05:03,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:05:03,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:05:03,980 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:05:03,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242595502] [2021-04-15 05:05:03,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729216870] [2021-04-15 05:05:03,981 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:05:04,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:05:04,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:05:04,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:05:04,431 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-04-15 05:05:04,543 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_75, v_prenex_77], 6=[A, v_prenex_73]} [2021-04-15 05:05:04,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:04,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:04,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:04,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 05:05:04,557 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:05:04,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:04,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:04,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 7 [2021-04-15 05:05:04,568 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:05:04,764 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2021-04-15 05:05:04,765 INFO L628 ElimStorePlain]: treesize reduction 168, result has 46.7 percent of original size [2021-04-15 05:05:04,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:04,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:04,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-04-15 05:05:04,774 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:05:04,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:05:04,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:04,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:04,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-04-15 05:05:04,844 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:05:04,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:05:04,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:04,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:04,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:04,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-04-15 05:05:04,909 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:05:04,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:05:04,955 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-04-15 05:05:04,955 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:381, output treesize:55 [2021-04-15 05:05:05,024 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:05:05,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:05:05,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-04-15 05:05:05,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953256705] [2021-04-15 05:05:05,025 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:05:05,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:05:05,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:05:05,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:05:05,025 INFO L87 Difference]: Start difference. First operand 1545 states and 5179 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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) [2021-04-15 05:05:05,922 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 39 [2021-04-15 05:05:06,530 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 41 [2021-04-15 05:05:06,671 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 40 [2021-04-15 05:05:07,281 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2021-04-15 05:05:07,682 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-04-15 05:05:07,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:05:07,898 INFO L93 Difference]: Finished difference Result 2157 states and 7044 transitions. [2021-04-15 05:05:07,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 05:05:07,899 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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 26 [2021-04-15 05:05:07,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:05:07,903 INFO L225 Difference]: With dead ends: 2157 [2021-04-15 05:05:07,903 INFO L226 Difference]: Without dead ends: 2142 [2021-04-15 05:05:07,903 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 3033.5ms TimeCoverageRelationStatistics Valid=362, Invalid=1530, Unknown=0, NotChecked=0, Total=1892 [2021-04-15 05:05:07,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2142 states. [2021-04-15 05:05:07,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2142 to 1545. [2021-04-15 05:05:07,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1545 states, 1544 states have (on average 3.3542746113989637) internal successors, (5179), 1544 states have internal predecessors, (5179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:05:07,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1545 states to 1545 states and 5179 transitions. [2021-04-15 05:05:07,926 INFO L78 Accepts]: Start accepts. Automaton has 1545 states and 5179 transitions. Word has length 26 [2021-04-15 05:05:07,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:05:07,926 INFO L480 AbstractCegarLoop]: Abstraction has 1545 states and 5179 transitions. [2021-04-15 05:05:07,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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) [2021-04-15 05:05:07,926 INFO L276 IsEmpty]: Start isEmpty. Operand 1545 states and 5179 transitions. [2021-04-15 05:05:07,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:05:07,928 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:05:07,928 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:05:08,130 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1279 [2021-04-15 05:05:08,130 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:05:08,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:05:08,131 INFO L82 PathProgramCache]: Analyzing trace with hash 346540478, now seen corresponding path program 23 times [2021-04-15 05:05:08,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:05:08,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454550164] [2021-04-15 05:05:08,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:05:08,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:05:08,387 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2021-04-15 05:05:08,778 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:05:08,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454550164] [2021-04-15 05:05:08,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097008888] [2021-04-15 05:05:08,778 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:05:08,800 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 05:05:08,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:05:08,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:05:08,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:05:09,321 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-04-15 05:05:09,598 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-04-15 05:05:09,959 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 57 [2021-04-15 05:05:10,007 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_87, v_prenex_88], 2=[A, v_prenex_86]} [2021-04-15 05:05:10,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:10,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-04-15 05:05:10,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:05:10,199 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-04-15 05:05:10,199 INFO L628 ElimStorePlain]: treesize reduction 54, result has 73.1 percent of original size [2021-04-15 05:05:10,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:10,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-04-15 05:05:10,206 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:05:10,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:05:10,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:10,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:10,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:10,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-04-15 05:05:10,289 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:05:10,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:10,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:10,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:05:10,295 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:05:10,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:05:10,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:10,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:10,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:05:10,362 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:05:10,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:05:10,422 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-04-15 05:05:10,423 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:211, output treesize:51 [2021-04-15 05:05:10,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:05:10,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:05:10,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-04-15 05:05:10,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421138392] [2021-04-15 05:05:10,500 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 05:05:10,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:05:10,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 05:05:10,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:05:10,500 INFO L87 Difference]: Start difference. First operand 1545 states and 5179 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:05:11,245 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-04-15 05:05:11,467 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2021-04-15 05:05:11,782 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2021-04-15 05:05:12,590 WARN L205 SmtUtils]: Spent 547.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 81 [2021-04-15 05:05:13,267 WARN L205 SmtUtils]: Spent 622.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 78 [2021-04-15 05:05:13,940 WARN L205 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 76 [2021-04-15 05:05:14,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:05:14,159 INFO L93 Difference]: Finished difference Result 2023 states and 6590 transitions. [2021-04-15 05:05:14,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 05:05:14,159 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:05:14,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:05:14,163 INFO L225 Difference]: With dead ends: 2023 [2021-04-15 05:05:14,163 INFO L226 Difference]: Without dead ends: 2008 [2021-04-15 05:05:14,163 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 4366.6ms TimeCoverageRelationStatistics Valid=203, Invalid=789, Unknown=0, NotChecked=0, Total=992 [2021-04-15 05:05:14,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2008 states. [2021-04-15 05:05:14,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2008 to 1556. [2021-04-15 05:05:14,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1556 states, 1555 states have (on average 3.354983922829582) internal successors, (5217), 1555 states have internal predecessors, (5217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:05:14,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1556 states to 1556 states and 5217 transitions. [2021-04-15 05:05:14,183 INFO L78 Accepts]: Start accepts. Automaton has 1556 states and 5217 transitions. Word has length 26 [2021-04-15 05:05:14,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:05:14,183 INFO L480 AbstractCegarLoop]: Abstraction has 1556 states and 5217 transitions. [2021-04-15 05:05:14,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:05:14,183 INFO L276 IsEmpty]: Start isEmpty. Operand 1556 states and 5217 transitions. [2021-04-15 05:05:14,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:05:14,186 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:05:14,186 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:05:14,395 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1293,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:05:14,395 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:05:14,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:05:14,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1896922042, now seen corresponding path program 44 times [2021-04-15 05:05:14,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:05:14,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038572613] [2021-04-15 05:05:14,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:05:14,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:05:14,623 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-04-15 05:05:14,738 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-04-15 05:05:14,886 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 31 [2021-04-15 05:05:15,021 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-04-15 05:05:15,230 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:05:15,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038572613] [2021-04-15 05:05:15,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783501608] [2021-04-15 05:05:15,231 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:05:15,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:05:15,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:05:15,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:05:15,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:05:16,006 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-04-15 05:05:16,548 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 87 [2021-04-15 05:05:17,047 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_125], 6=[v_prenex_124, v_prenex_126]} [2021-04-15 05:05:17,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:17,092 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-04-15 05:05:17,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-04-15 05:05:17,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:05:17,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:17,134 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-04-15 05:05:17,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-04-15 05:05:17,141 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:05:17,487 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-04-15 05:05:17,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:05:17,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:17,521 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:05:17,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-04-15 05:05:17,530 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:05:17,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:17,562 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-04-15 05:05:17,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-04-15 05:05:17,564 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:05:17,845 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-04-15 05:05:17,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:05:17,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:17,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:17,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:17,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:17,878 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:05:17,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-04-15 05:05:17,885 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:05:17,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:17,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:17,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:17,913 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-04-15 05:05:17,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 24 [2021-04-15 05:05:17,915 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:05:18,154 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-04-15 05:05:18,154 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:05:18,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:18,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:18,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:18,199 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-04-15 05:05:18,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 28 [2021-04-15 05:05:18,201 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:05:18,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:18,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:18,234 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-04-15 05:05:18,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 28 [2021-04-15 05:05:18,238 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:05:18,464 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-04-15 05:05:18,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:05:18,497 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-04-15 05:05:18,497 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 13 variables, input treesize:433, output treesize:357 [2021-04-15 05:05:18,784 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2021-04-15 05:05:18,836 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:05:18,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:05:18,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-04-15 05:05:18,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041303382] [2021-04-15 05:05:18,836 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 05:05:18,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:05:18,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 05:05:18,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-04-15 05:05:18,837 INFO L87 Difference]: Start difference. First operand 1556 states and 5217 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 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) [2021-04-15 05:05:19,465 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 37 [2021-04-15 05:05:19,981 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 44 [2021-04-15 05:05:20,289 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2021-04-15 05:05:20,599 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 39 [2021-04-15 05:05:20,760 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2021-04-15 05:05:20,946 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 43 [2021-04-15 05:05:21,328 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 40 [2021-04-15 05:05:21,584 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-04-15 05:05:21,736 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2021-04-15 05:05:22,320 WARN L205 SmtUtils]: Spent 554.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2021-04-15 05:05:22,509 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 46 [2021-04-15 05:05:22,700 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 43 [2021-04-15 05:05:23,527 WARN L205 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 70 [2021-04-15 05:05:24,089 WARN L205 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 62 [2021-04-15 05:05:24,293 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 50 [2021-04-15 05:05:24,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:05:24,863 INFO L93 Difference]: Finished difference Result 2283 states and 7340 transitions. [2021-04-15 05:05:24,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-04-15 05:05:24,864 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 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 26 [2021-04-15 05:05:24,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:05:24,878 INFO L225 Difference]: With dead ends: 2283 [2021-04-15 05:05:24,878 INFO L226 Difference]: Without dead ends: 2261 [2021-04-15 05:05:24,879 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 7056.5ms TimeCoverageRelationStatistics Valid=474, Invalid=2282, Unknown=0, NotChecked=0, Total=2756 [2021-04-15 05:05:24,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2261 states. [2021-04-15 05:05:24,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2261 to 1570. [2021-04-15 05:05:24,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1570 states, 1569 states have (on average 3.3626513702995537) internal successors, (5276), 1569 states have internal predecessors, (5276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:05:24,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1570 states to 1570 states and 5276 transitions. [2021-04-15 05:05:24,901 INFO L78 Accepts]: Start accepts. Automaton has 1570 states and 5276 transitions. Word has length 26 [2021-04-15 05:05:24,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:05:24,901 INFO L480 AbstractCegarLoop]: Abstraction has 1570 states and 5276 transitions. [2021-04-15 05:05:24,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 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) [2021-04-15 05:05:24,902 INFO L276 IsEmpty]: Start isEmpty. Operand 1570 states and 5276 transitions. [2021-04-15 05:05:24,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:05:24,904 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:05:24,904 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:05:25,104 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1304,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:05:25,105 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:05:25,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:05:25,105 INFO L82 PathProgramCache]: Analyzing trace with hash 920603198, now seen corresponding path program 45 times [2021-04-15 05:05:25,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:05:25,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321240986] [2021-04-15 05:05:25,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:05:25,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:05:25,738 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2021-04-15 05:05:25,914 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:05:25,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321240986] [2021-04-15 05:05:25,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71201711] [2021-04-15 05:05:25,914 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:05:25,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 05:05:25,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:05:25,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:05:25,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:05:26,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:26,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:26,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:26,978 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-04-15 05:05:26,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 26 [2021-04-15 05:05:26,982 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:05:26,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:26,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:26,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:27,021 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:05:27,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 47 [2021-04-15 05:05:27,028 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:05:27,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:27,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:27,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:27,066 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-04-15 05:05:27,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 29 [2021-04-15 05:05:27,068 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:05:27,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:27,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:27,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:27,094 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-04-15 05:05:27,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-04-15 05:05:27,095 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:05:27,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:27,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:27,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:27,135 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-04-15 05:05:27,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 22 [2021-04-15 05:05:27,137 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:05:27,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:27,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:27,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:27,178 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:05:27,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-04-15 05:05:27,190 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:05:27,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:27,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:27,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:27,236 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 05:05:27,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 33 [2021-04-15 05:05:27,242 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:05:27,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:27,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:27,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:27,283 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-04-15 05:05:27,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 28 [2021-04-15 05:05:27,286 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:05:27,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:27,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:27,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:27,329 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-04-15 05:05:27,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 25 [2021-04-15 05:05:27,332 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:05:27,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:27,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:27,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:27,376 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 05:05:27,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 30 [2021-04-15 05:05:27,385 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:05:27,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:27,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:27,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:27,428 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-04-15 05:05:27,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 28 [2021-04-15 05:05:27,430 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:05:27,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:27,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:27,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:27,456 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-04-15 05:05:27,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-04-15 05:05:27,457 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:05:27,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:27,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:27,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:27,485 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-04-15 05:05:27,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-04-15 05:05:27,486 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:05:27,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:27,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:27,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:27,511 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-04-15 05:05:27,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-04-15 05:05:27,513 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:05:27,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:27,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:27,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:27,543 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-04-15 05:05:27,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-04-15 05:05:27,545 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:05:27,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:27,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:27,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:27,580 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-04-15 05:05:27,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 25 [2021-04-15 05:05:27,584 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-04-15 05:05:27,879 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 30 [2021-04-15 05:05:27,880 INFO L628 ElimStorePlain]: treesize reduction 255, result has 38.4 percent of original size [2021-04-15 05:05:27,882 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-04-15 05:05:27,882 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:953, output treesize:180 [2021-04-15 05:05:28,043 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-04-15 05:05:28,113 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:05:28,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:05:28,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-04-15 05:05:28,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925838969] [2021-04-15 05:05:28,114 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 05:05:28,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:05:28,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 05:05:28,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-04-15 05:05:28,114 INFO L87 Difference]: Start difference. First operand 1570 states and 5276 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:05:29,514 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-04-15 05:05:29,663 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-04-15 05:05:29,829 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-04-15 05:05:30,214 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2021-04-15 05:05:30,386 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2021-04-15 05:05:30,888 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-04-15 05:05:31,057 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2021-04-15 05:05:31,643 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-04-15 05:05:32,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:05:32,362 INFO L93 Difference]: Finished difference Result 2436 states and 7650 transitions. [2021-04-15 05:05:32,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-04-15 05:05:32,363 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:05:32,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:05:32,367 INFO L225 Difference]: With dead ends: 2436 [2021-04-15 05:05:32,367 INFO L226 Difference]: Without dead ends: 2406 [2021-04-15 05:05:32,367 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1066 ImplicationChecksByTransitivity, 4421.0ms TimeCoverageRelationStatistics Valid=513, Invalid=2909, Unknown=0, NotChecked=0, Total=3422 [2021-04-15 05:05:32,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2406 states. [2021-04-15 05:05:32,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2406 to 1617. [2021-04-15 05:05:32,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1617 states, 1616 states have (on average 3.359529702970297) internal successors, (5429), 1616 states have internal predecessors, (5429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:05:32,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1617 states to 1617 states and 5429 transitions. [2021-04-15 05:05:32,391 INFO L78 Accepts]: Start accepts. Automaton has 1617 states and 5429 transitions. Word has length 26 [2021-04-15 05:05:32,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:05:32,391 INFO L480 AbstractCegarLoop]: Abstraction has 1617 states and 5429 transitions. [2021-04-15 05:05:32,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:05:32,392 INFO L276 IsEmpty]: Start isEmpty. Operand 1617 states and 5429 transitions. [2021-04-15 05:05:32,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:05:32,394 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:05:32,394 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:05:32,594 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1380,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:05:32,594 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:05:32,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:05:32,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1936410854, now seen corresponding path program 24 times [2021-04-15 05:05:32,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:05:32,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121058667] [2021-04-15 05:05:32,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:05:32,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:05:32,969 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-04-15 05:05:33,085 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:05:33,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121058667] [2021-04-15 05:05:33,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013233459] [2021-04-15 05:05:33,085 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:05:33,108 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 05:05:33,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:05:33,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-04-15 05:05:33,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:05:33,651 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-04-15 05:05:34,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:34,072 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:05:34,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 41 [2021-04-15 05:05:34,076 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:05:34,278 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2021-04-15 05:05:34,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:05:34,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:34,314 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-04-15 05:05:34,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 33 [2021-04-15 05:05:34,319 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:05:34,526 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-04-15 05:05:34,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:05:34,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:34,562 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-04-15 05:05:34,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 34 [2021-04-15 05:05:34,568 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:05:34,761 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2021-04-15 05:05:34,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:05:34,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:34,791 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-04-15 05:05:34,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 30 [2021-04-15 05:05:34,793 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:05:34,984 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-04-15 05:05:34,984 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:05:34,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:35,026 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-04-15 05:05:35,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 29 [2021-04-15 05:05:35,029 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:05:35,218 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-04-15 05:05:35,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:05:35,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:35,241 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:05:35,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 34 [2021-04-15 05:05:35,250 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:05:35,432 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-04-15 05:05:35,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:05:35,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:35,456 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:05:35,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 41 [2021-04-15 05:05:35,458 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:05:35,655 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-04-15 05:05:35,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:05:35,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:35,687 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-04-15 05:05:35,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 36 [2021-04-15 05:05:35,690 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:05:35,875 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-04-15 05:05:35,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:05:35,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-04-15 05:05:35,891 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:445, output treesize:504 [2021-04-15 05:05:36,326 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2021-04-15 05:05:36,532 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-04-15 05:05:36,728 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:05:36,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:05:36,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-04-15 05:05:36,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880717473] [2021-04-15 05:05:36,729 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 05:05:36,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:05:36,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 05:05:36,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:05:36,729 INFO L87 Difference]: Start difference. First operand 1617 states and 5429 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:05:37,015 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 25 [2021-04-15 05:05:37,534 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 45 [2021-04-15 05:05:37,965 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 54 [2021-04-15 05:05:38,309 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 52 [2021-04-15 05:05:38,470 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 46 [2021-04-15 05:05:38,717 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2021-04-15 05:05:39,198 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 55 [2021-04-15 05:05:39,349 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-04-15 05:05:39,547 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2021-04-15 05:05:39,925 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2021-04-15 05:05:40,610 WARN L205 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 81 [2021-04-15 05:05:41,135 WARN L205 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 84 [2021-04-15 05:05:41,808 WARN L205 SmtUtils]: Spent 533.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 80 [2021-04-15 05:05:42,138 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-04-15 05:05:42,554 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 60 [2021-04-15 05:05:43,157 WARN L205 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 68 [2021-04-15 05:05:43,882 WARN L205 SmtUtils]: Spent 683.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 60 [2021-04-15 05:05:44,218 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 42 [2021-04-15 05:05:45,094 WARN L205 SmtUtils]: Spent 762.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 70 [2021-04-15 05:05:45,525 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 45 [2021-04-15 05:05:45,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:05:45,604 INFO L93 Difference]: Finished difference Result 2483 states and 7942 transitions. [2021-04-15 05:05:45,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-04-15 05:05:45,605 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:05:45,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:05:45,609 INFO L225 Difference]: With dead ends: 2483 [2021-04-15 05:05:45,609 INFO L226 Difference]: Without dead ends: 2449 [2021-04-15 05:05:45,610 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 9582.4ms TimeCoverageRelationStatistics Valid=396, Invalid=1956, Unknown=0, NotChecked=0, Total=2352 [2021-04-15 05:05:45,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2449 states. [2021-04-15 05:05:45,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2449 to 1632. [2021-04-15 05:05:45,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1632 states, 1631 states have (on average 3.3678724708767627) internal successors, (5493), 1631 states have internal predecessors, (5493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:05:45,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1632 states to 1632 states and 5493 transitions. [2021-04-15 05:05:45,633 INFO L78 Accepts]: Start accepts. Automaton has 1632 states and 5493 transitions. Word has length 26 [2021-04-15 05:05:45,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:05:45,633 INFO L480 AbstractCegarLoop]: Abstraction has 1632 states and 5493 transitions. [2021-04-15 05:05:45,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:05:45,633 INFO L276 IsEmpty]: Start isEmpty. Operand 1632 states and 5493 transitions. [2021-04-15 05:05:45,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:05:45,635 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:05:45,635 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:05:45,835 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1506,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:05:45,836 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:05:45,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:05:45,836 INFO L82 PathProgramCache]: Analyzing trace with hash 885830154, now seen corresponding path program 25 times [2021-04-15 05:05:45,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:05:45,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423556095] [2021-04-15 05:05:45,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:05:45,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:05:46,060 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-04-15 05:05:46,186 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-04-15 05:05:46,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:05:46,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423556095] [2021-04-15 05:05:46,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297127401] [2021-04-15 05:05:46,382 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:05:46,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:05:46,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:05:46,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:05:46,960 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-04-15 05:05:47,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:47,036 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:05:47,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-04-15 05:05:47,042 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:05:47,196 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-04-15 05:05:47,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:05:47,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:47,214 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:05:47,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-04-15 05:05:47,216 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:05:47,374 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-04-15 05:05:47,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:05:47,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:47,391 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:05:47,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-04-15 05:05:47,394 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:05:47,569 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-04-15 05:05:47,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:05:47,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:47,586 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:05:47,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-04-15 05:05:47,588 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:05:47,753 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-04-15 05:05:47,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:05:47,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:47,773 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:05:47,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-04-15 05:05:47,776 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:05:47,938 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-04-15 05:05:47,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:05:47,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:47,955 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:05:47,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-04-15 05:05:47,961 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:05:48,150 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-04-15 05:05:48,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:05:48,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:48,167 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:05:48,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-04-15 05:05:48,170 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:05:48,328 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-04-15 05:05:48,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:05:48,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:48,348 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:05:48,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-04-15 05:05:48,351 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:05:48,488 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-04-15 05:05:48,489 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:05:48,495 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-04-15 05:05:48,496 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:325, output treesize:174 [2021-04-15 05:05:48,627 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-04-15 05:05:48,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:05:48,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:05:48,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-04-15 05:05:48,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901828787] [2021-04-15 05:05:48,789 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:05:48,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:05:48,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:05:48,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:05:48,790 INFO L87 Difference]: Start difference. First operand 1632 states and 5493 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:05:48,999 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 26 [2021-04-15 05:05:49,223 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-04-15 05:05:49,581 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2021-04-15 05:05:50,312 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-04-15 05:05:50,894 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2021-04-15 05:05:51,313 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-04-15 05:05:51,533 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2021-04-15 05:05:52,050 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2021-04-15 05:05:52,311 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 68 [2021-04-15 05:05:52,642 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-04-15 05:05:53,021 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 42 [2021-04-15 05:05:53,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:05:53,243 INFO L93 Difference]: Finished difference Result 2652 states and 8518 transitions. [2021-04-15 05:05:53,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-04-15 05:05:53,244 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:05:53,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:05:53,248 INFO L225 Difference]: With dead ends: 2652 [2021-04-15 05:05:53,248 INFO L226 Difference]: Without dead ends: 2618 [2021-04-15 05:05:53,249 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 4477.6ms TimeCoverageRelationStatistics Valid=363, Invalid=1277, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 05:05:53,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2618 states. [2021-04-15 05:05:53,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2618 to 1646. [2021-04-15 05:05:53,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1646 states, 1645 states have (on average 3.374468085106383) internal successors, (5551), 1645 states have internal predecessors, (5551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:05:53,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1646 states to 1646 states and 5551 transitions. [2021-04-15 05:05:53,276 INFO L78 Accepts]: Start accepts. Automaton has 1646 states and 5551 transitions. Word has length 26 [2021-04-15 05:05:53,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:05:53,276 INFO L480 AbstractCegarLoop]: Abstraction has 1646 states and 5551 transitions. [2021-04-15 05:05:53,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:05:53,276 INFO L276 IsEmpty]: Start isEmpty. Operand 1646 states and 5551 transitions. [2021-04-15 05:05:53,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:05:53,278 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:05:53,278 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:05:53,479 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1537 [2021-04-15 05:05:53,479 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:05:53,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:05:53,479 INFO L82 PathProgramCache]: Analyzing trace with hash 2122915566, now seen corresponding path program 46 times [2021-04-15 05:05:53,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:05:53,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522808876] [2021-04-15 05:05:53,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:05:53,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:05:53,686 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-04-15 05:05:54,254 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:05:54,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522808876] [2021-04-15 05:05:54,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026575452] [2021-04-15 05:05:54,254 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:05:54,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:05:54,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:05:54,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:05:54,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:05:54,638 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-04-15 05:05:54,903 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-04-15 05:05:55,181 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 58 [2021-04-15 05:05:55,319 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_182, v_prenex_178], 6=[A, v_prenex_180]} [2021-04-15 05:05:55,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:55,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:55,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:55,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-04-15 05:05:55,332 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:05:55,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:55,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:55,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-04-15 05:05:55,341 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:05:55,503 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 52 [2021-04-15 05:05:55,504 INFO L628 ElimStorePlain]: treesize reduction 152, result has 43.3 percent of original size [2021-04-15 05:05:55,504 INFO L518 ElimStorePlain]: Eliminatee v_prenex_178 vanished before elimination [2021-04-15 05:05:55,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:55,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:55,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 05:05:55,511 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:05:55,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:05:55,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:55,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:05:55,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:05:55,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-04-15 05:05:55,573 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:05:55,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:05:55,621 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-04-15 05:05:55,621 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:329, output treesize:31 [2021-04-15 05:05:55,656 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:05:55,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:05:55,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-04-15 05:05:55,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728724970] [2021-04-15 05:05:55,657 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:05:55,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:05:55,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:05:55,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:05:55,657 INFO L87 Difference]: Start difference. First operand 1646 states and 5551 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:05:56,646 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 36 [2021-04-15 05:05:57,416 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 33 [2021-04-15 05:05:57,554 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-04-15 05:05:57,697 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-04-15 05:05:57,951 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-04-15 05:05:58,194 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2021-04-15 05:05:58,346 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-04-15 05:05:58,818 WARN L205 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2021-04-15 05:05:59,098 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-04-15 05:05:59,323 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-04-15 05:05:59,772 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 76 [2021-04-15 05:06:00,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:06:00,585 INFO L93 Difference]: Finished difference Result 2533 states and 8068 transitions. [2021-04-15 05:06:00,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-04-15 05:06:00,586 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:06:00,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:06:00,591 INFO L225 Difference]: With dead ends: 2533 [2021-04-15 05:06:00,591 INFO L226 Difference]: Without dead ends: 2503 [2021-04-15 05:06:00,591 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 825 ImplicationChecksByTransitivity, 5318.9ms TimeCoverageRelationStatistics Valid=499, Invalid=2153, Unknown=0, NotChecked=0, Total=2652 [2021-04-15 05:06:00,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2503 states. [2021-04-15 05:06:00,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2503 to 1730. [2021-04-15 05:06:00,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1730 states, 1729 states have (on average 3.3846153846153846) internal successors, (5852), 1729 states have internal predecessors, (5852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:06:00,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1730 states to 1730 states and 5852 transitions. [2021-04-15 05:06:00,616 INFO L78 Accepts]: Start accepts. Automaton has 1730 states and 5852 transitions. Word has length 26 [2021-04-15 05:06:00,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:06:00,616 INFO L480 AbstractCegarLoop]: Abstraction has 1730 states and 5852 transitions. [2021-04-15 05:06:00,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:06:00,616 INFO L276 IsEmpty]: Start isEmpty. Operand 1730 states and 5852 transitions. [2021-04-15 05:06:00,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:06:00,618 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:06:00,618 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:06:00,819 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1552 [2021-04-15 05:06:00,820 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:06:00,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:06:00,820 INFO L82 PathProgramCache]: Analyzing trace with hash -338403078, now seen corresponding path program 47 times [2021-04-15 05:06:00,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:06:00,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905151029] [2021-04-15 05:06:00,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:06:00,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:06:01,508 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:06:01,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905151029] [2021-04-15 05:06:01,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276840763] [2021-04-15 05:06:01,508 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:06:01,530 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 05:06:01,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:06:01,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:06:01,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:06:02,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:02,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:02,186 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-04-15 05:06:02,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 28 [2021-04-15 05:06:02,189 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:02,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:02,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:02,224 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-04-15 05:06:02,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 26 [2021-04-15 05:06:02,227 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:02,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:02,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:02,266 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:06:02,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 47 [2021-04-15 05:06:02,277 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:02,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:02,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:02,312 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:06:02,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-04-15 05:06:02,325 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:02,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:02,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:02,361 INFO L354 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2021-04-15 05:06:02,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 26 [2021-04-15 05:06:02,364 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:02,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:02,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:02,401 INFO L354 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2021-04-15 05:06:02,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 26 [2021-04-15 05:06:02,403 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:02,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:02,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:02,429 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-04-15 05:06:02,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-04-15 05:06:02,430 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:02,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:02,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:02,454 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-04-15 05:06:02,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 1 [2021-04-15 05:06:02,456 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:02,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:02,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:02,481 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-04-15 05:06:02,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-04-15 05:06:02,482 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:02,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:02,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:02,506 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-04-15 05:06:02,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-04-15 05:06:02,507 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:02,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:02,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:02,542 INFO L354 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2021-04-15 05:06:02,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 23 [2021-04-15 05:06:02,545 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:02,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:02,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:02,570 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-04-15 05:06:02,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-04-15 05:06:02,571 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:02,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:02,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:02,595 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-04-15 05:06:02,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-04-15 05:06:02,596 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:02,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:02,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:02,620 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-04-15 05:06:02,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-04-15 05:06:02,621 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:02,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:02,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:02,656 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-04-15 05:06:02,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 25 [2021-04-15 05:06:02,659 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:02,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:02,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:02,673 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-04-15 05:06:02,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-04-15 05:06:02,674 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:02,811 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 26 [2021-04-15 05:06:02,811 INFO L628 ElimStorePlain]: treesize reduction 108, result has 46.3 percent of original size [2021-04-15 05:06:02,815 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-04-15 05:06:02,815 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:761, output treesize:83 [2021-04-15 05:06:02,964 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:06:02,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:06:02,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-04-15 05:06:02,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255273902] [2021-04-15 05:06:02,964 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 05:06:02,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:06:02,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 05:06:02,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:06:02,965 INFO L87 Difference]: Start difference. First operand 1730 states and 5852 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:06:03,824 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2021-04-15 05:06:04,332 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 40 [2021-04-15 05:06:04,549 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-04-15 05:06:05,173 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2021-04-15 05:06:05,418 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-04-15 05:06:05,961 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-04-15 05:06:06,130 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2021-04-15 05:06:06,419 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 39 [2021-04-15 05:06:06,553 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 25 [2021-04-15 05:06:06,880 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 42 [2021-04-15 05:06:07,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:06:07,199 INFO L93 Difference]: Finished difference Result 2949 states and 9251 transitions. [2021-04-15 05:06:07,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-04-15 05:06:07,200 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:06:07,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:06:07,205 INFO L225 Difference]: With dead ends: 2949 [2021-04-15 05:06:07,205 INFO L226 Difference]: Without dead ends: 2901 [2021-04-15 05:06:07,206 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1017 ImplicationChecksByTransitivity, 4429.0ms TimeCoverageRelationStatistics Valid=626, Invalid=2566, Unknown=0, NotChecked=0, Total=3192 [2021-04-15 05:06:07,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2901 states. [2021-04-15 05:06:07,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2901 to 1752. [2021-04-15 05:06:07,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 3.3872073101085096) internal successors, (5931), 1751 states have internal predecessors, (5931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:06:07,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 5931 transitions. [2021-04-15 05:06:07,233 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 5931 transitions. Word has length 26 [2021-04-15 05:06:07,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:06:07,233 INFO L480 AbstractCegarLoop]: Abstraction has 1752 states and 5931 transitions. [2021-04-15 05:06:07,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:06:07,233 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 5931 transitions. [2021-04-15 05:06:07,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:06:07,235 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:06:07,235 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:06:07,435 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1571,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:06:07,436 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:06:07,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:06:07,436 INFO L82 PathProgramCache]: Analyzing trace with hash 2079051698, now seen corresponding path program 26 times [2021-04-15 05:06:07,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:06:07,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450029263] [2021-04-15 05:06:07,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:06:07,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:06:07,685 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-04-15 05:06:07,935 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:06:07,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450029263] [2021-04-15 05:06:07,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776663485] [2021-04-15 05:06:07,935 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:06:07,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:06:07,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:06:07,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:06:07,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:06:08,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:08,309 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:06:08,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:06:08,310 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:08,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:08,322 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:06:08,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:06:08,324 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:08,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:08,340 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:06:08,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-04-15 05:06:08,343 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:08,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:08,355 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:06:08,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:06:08,357 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:08,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:08,374 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:06:08,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-04-15 05:06:08,376 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:08,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:08,393 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:06:08,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-04-15 05:06:08,395 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:08,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:08,408 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:06:08,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:06:08,410 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:08,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:08,426 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:06:08,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-04-15 05:06:08,428 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:08,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:08,441 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:06:08,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-04-15 05:06:08,442 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:08,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:08,458 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:06:08,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-04-15 05:06:08,464 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:08,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:08,477 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:06:08,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-04-15 05:06:08,479 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:08,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:08,527 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:06:08,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-04-15 05:06:08,530 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:08,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:08,547 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:06:08,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-04-15 05:06:08,549 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:08,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:08,564 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:06:08,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-04-15 05:06:08,570 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:08,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:08,581 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:06:08,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-04-15 05:06:08,583 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:08,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:08,590 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:06:08,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-04-15 05:06:08,592 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:08,699 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-04-15 05:06:08,699 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:06:08,701 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-04-15 05:06:08,701 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-04-15 05:06:08,838 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-04-15 05:06:08,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:06:08,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:06:08,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-04-15 05:06:08,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344270990] [2021-04-15 05:06:08,991 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:06:08,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:06:08,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:06:08,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:06:08,992 INFO L87 Difference]: Start difference. First operand 1752 states and 5931 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:06:09,251 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 21 [2021-04-15 05:06:09,631 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2021-04-15 05:06:09,808 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 41 [2021-04-15 05:06:10,178 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2021-04-15 05:06:10,476 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-04-15 05:06:10,742 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 45 [2021-04-15 05:06:11,100 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2021-04-15 05:06:11,473 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-04-15 05:06:11,660 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2021-04-15 05:06:11,795 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-04-15 05:06:12,078 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-04-15 05:06:12,411 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2021-04-15 05:06:12,848 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 44 [2021-04-15 05:06:12,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:06:12,927 INFO L93 Difference]: Finished difference Result 2355 states and 7783 transitions. [2021-04-15 05:06:12,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 05:06:12,928 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:06:12,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:06:12,932 INFO L225 Difference]: With dead ends: 2355 [2021-04-15 05:06:12,932 INFO L226 Difference]: Without dead ends: 2336 [2021-04-15 05:06:12,932 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 4072.8ms TimeCoverageRelationStatistics Valid=262, Invalid=1378, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 05:06:12,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2336 states. [2021-04-15 05:06:12,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2336 to 1738. [2021-04-15 05:06:12,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1738 states, 1737 states have (on average 3.379965457685665) internal successors, (5871), 1737 states have internal predecessors, (5871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:06:12,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1738 states to 1738 states and 5871 transitions. [2021-04-15 05:06:12,958 INFO L78 Accepts]: Start accepts. Automaton has 1738 states and 5871 transitions. Word has length 26 [2021-04-15 05:06:12,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:06:12,959 INFO L480 AbstractCegarLoop]: Abstraction has 1738 states and 5871 transitions. [2021-04-15 05:06:12,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:06:12,959 INFO L276 IsEmpty]: Start isEmpty. Operand 1738 states and 5871 transitions. [2021-04-15 05:06:12,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:06:12,962 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:06:12,962 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:06:13,164 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1675,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:06:13,165 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:06:13,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:06:13,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1795376066, now seen corresponding path program 27 times [2021-04-15 05:06:13,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:06:13,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287064157] [2021-04-15 05:06:13,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:06:13,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:06:13,564 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-04-15 05:06:13,762 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-04-15 05:06:13,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:06:13,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287064157] [2021-04-15 05:06:13,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028773633] [2021-04-15 05:06:13,890 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:06:13,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 05:06:13,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:06:13,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 32 conjunts are in the unsatisfiable core [2021-04-15 05:06:13,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:06:14,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:14,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:14,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:14,304 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-04-15 05:06:14,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 27 [2021-04-15 05:06:14,311 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:14,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:14,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:14,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:14,337 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-04-15 05:06:14,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 19 [2021-04-15 05:06:14,339 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:14,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:14,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:14,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:14,362 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-04-15 05:06:14,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 16 [2021-04-15 05:06:14,364 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:14,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:14,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:14,382 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-04-15 05:06:14,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 16 [2021-04-15 05:06:14,384 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:14,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:14,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:14,417 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-04-15 05:06:14,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 26 [2021-04-15 05:06:14,420 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:14,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:14,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:14,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:14,439 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-04-15 05:06:14,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 19 [2021-04-15 05:06:14,440 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:14,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:14,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:14,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:14,487 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-04-15 05:06:14,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 30 [2021-04-15 05:06:14,490 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:14,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:14,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:14,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:14,510 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-04-15 05:06:14,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 16 [2021-04-15 05:06:14,511 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:14,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:14,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:14,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:14,542 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:06:14,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2021-04-15 05:06:14,551 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:14,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:14,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:14,581 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:06:14,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 37 [2021-04-15 05:06:14,583 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:14,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:14,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:14,613 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:06:14,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 37 [2021-04-15 05:06:14,617 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:14,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:14,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:14,637 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-04-15 05:06:14,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 19 [2021-04-15 05:06:14,638 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:14,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:14,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:14,656 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-04-15 05:06:14,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 19 [2021-04-15 05:06:14,658 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:14,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:14,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:14,677 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-04-15 05:06:14,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 22 [2021-04-15 05:06:14,679 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:14,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:14,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:14,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:14,712 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-04-15 05:06:14,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 23 [2021-04-15 05:06:14,714 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:14,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:14,742 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-04-15 05:06:14,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 30 [2021-04-15 05:06:14,748 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:14,943 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-04-15 05:06:14,944 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:06:14,946 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-04-15 05:06:14,947 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:905, output treesize:313 [2021-04-15 05:06:15,164 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-04-15 05:06:15,397 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-04-15 05:06:15,788 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-04-15 05:06:15,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:06:15,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:06:15,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-04-15 05:06:15,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574309663] [2021-04-15 05:06:15,960 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 05:06:15,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:06:15,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 05:06:15,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:06:15,960 INFO L87 Difference]: Start difference. First operand 1738 states and 5871 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:06:17,218 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-04-15 05:06:17,581 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2021-04-15 05:06:17,844 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2021-04-15 05:06:18,201 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 61 [2021-04-15 05:06:18,726 WARN L205 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-04-15 05:06:19,290 WARN L205 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2021-04-15 05:06:19,799 WARN L205 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 39 [2021-04-15 05:06:20,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:06:20,023 INFO L93 Difference]: Finished difference Result 2428 states and 7983 transitions. [2021-04-15 05:06:20,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 05:06:20,024 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:06:20,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:06:20,028 INFO L225 Difference]: With dead ends: 2428 [2021-04-15 05:06:20,028 INFO L226 Difference]: Without dead ends: 2378 [2021-04-15 05:06:20,029 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 4754.4ms TimeCoverageRelationStatistics Valid=258, Invalid=1224, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 05:06:20,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2378 states. [2021-04-15 05:06:20,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2378 to 1738. [2021-04-15 05:06:20,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1738 states, 1737 states have (on average 3.379965457685665) internal successors, (5871), 1737 states have internal predecessors, (5871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:06:20,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1738 states to 1738 states and 5871 transitions. [2021-04-15 05:06:20,054 INFO L78 Accepts]: Start accepts. Automaton has 1738 states and 5871 transitions. Word has length 26 [2021-04-15 05:06:20,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:06:20,054 INFO L480 AbstractCegarLoop]: Abstraction has 1738 states and 5871 transitions. [2021-04-15 05:06:20,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:06:20,054 INFO L276 IsEmpty]: Start isEmpty. Operand 1738 states and 5871 transitions. [2021-04-15 05:06:20,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:06:20,056 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:06:20,056 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:06:20,257 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1692,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:06:20,257 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:06:20,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:06:20,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1946487342, now seen corresponding path program 48 times [2021-04-15 05:06:20,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:06:20,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734308411] [2021-04-15 05:06:20,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:06:20,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:06:20,527 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-04-15 05:06:20,675 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-04-15 05:06:20,805 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 33 [2021-04-15 05:06:21,025 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:06:21,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734308411] [2021-04-15 05:06:21,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130412210] [2021-04-15 05:06:21,025 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:06:21,047 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 05:06:21,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:06:21,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:06:21,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:06:22,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:22,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:22,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:22,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:22,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:22,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:22,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-04-15 05:06:22,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:22,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:22,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:22,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:22,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:22,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:22,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:22,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-04-15 05:06:22,049 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:22,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:22,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:22,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:22,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:22,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:22,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:22,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-04-15 05:06:22,066 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:22,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:22,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:22,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:22,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:22,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:22,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:22,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-04-15 05:06:22,081 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:22,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:22,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:22,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:22,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:22,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:22,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:22,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-04-15 05:06:22,096 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:22,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:22,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:22,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:22,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:22,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:22,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:22,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2021-04-15 05:06:22,114 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:22,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:22,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:22,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:22,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:22,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:22,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:22,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-04-15 05:06:22,129 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:22,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:22,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:22,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:22,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:22,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:22,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:22,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-04-15 05:06:22,144 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:22,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:22,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:22,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:22,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:22,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:22,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:22,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-04-15 05:06:22,158 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:22,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:22,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:22,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:22,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:22,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:22,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:22,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-04-15 05:06:22,173 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:22,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:22,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:22,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:22,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:22,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:22,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:22,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 16 [2021-04-15 05:06:22,200 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:22,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:22,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:22,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:22,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:22,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:22,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:22,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2021-04-15 05:06:22,219 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:22,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:22,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:22,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:22,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:22,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:22,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:22,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 13 [2021-04-15 05:06:22,237 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:22,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:22,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:22,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:22,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:22,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:22,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:22,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-04-15 05:06:22,256 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:22,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:22,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:22,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:22,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:22,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:22,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:22,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 13 [2021-04-15 05:06:22,271 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:22,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:22,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:22,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:22,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:22,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-04-15 05:06:22,280 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:22,332 INFO L628 ElimStorePlain]: treesize reduction 20, result has 64.9 percent of original size [2021-04-15 05:06:22,333 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 05:06:22,334 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:27 [2021-04-15 05:06:22,393 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:06:22,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:06:22,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-04-15 05:06:22,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861290083] [2021-04-15 05:06:22,393 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:06:22,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:06:22,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:06:22,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:06:22,394 INFO L87 Difference]: Start difference. First operand 1738 states and 5871 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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) [2021-04-15 05:06:23,088 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 32 [2021-04-15 05:06:23,232 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2021-04-15 05:06:23,667 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 41 [2021-04-15 05:06:23,861 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 43 [2021-04-15 05:06:24,312 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 43 [2021-04-15 05:06:24,453 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 34 [2021-04-15 05:06:25,094 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 45 [2021-04-15 05:06:25,242 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 41 [2021-04-15 05:06:25,828 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-04-15 05:06:25,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:06:25,973 INFO L93 Difference]: Finished difference Result 2197 states and 7216 transitions. [2021-04-15 05:06:25,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 05:06:25,974 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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 26 [2021-04-15 05:06:25,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:06:25,979 INFO L225 Difference]: With dead ends: 2197 [2021-04-15 05:06:25,979 INFO L226 Difference]: Without dead ends: 2175 [2021-04-15 05:06:25,979 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 3808.4ms TimeCoverageRelationStatistics Valid=375, Invalid=1605, Unknown=0, NotChecked=0, Total=1980 [2021-04-15 05:06:25,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2175 states. [2021-04-15 05:06:25,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2175 to 1734. [2021-04-15 05:06:25,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1734 states, 1733 states have (on average 3.378534333525678) internal successors, (5855), 1733 states have internal predecessors, (5855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:06:26,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 5855 transitions. [2021-04-15 05:06:26,003 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 5855 transitions. Word has length 26 [2021-04-15 05:06:26,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:06:26,003 INFO L480 AbstractCegarLoop]: Abstraction has 1734 states and 5855 transitions. [2021-04-15 05:06:26,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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) [2021-04-15 05:06:26,003 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 5855 transitions. [2021-04-15 05:06:26,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:06:26,006 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:06:26,006 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:06:26,206 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1733,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:06:26,207 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:06:26,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:06:26,207 INFO L82 PathProgramCache]: Analyzing trace with hash 2027886398, now seen corresponding path program 49 times [2021-04-15 05:06:26,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:06:26,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982243778] [2021-04-15 05:06:26,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:06:26,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:06:26,460 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-04-15 05:06:26,905 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:06:26,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982243778] [2021-04-15 05:06:26,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240222907] [2021-04-15 05:06:26,905 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:06:26,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:06:26,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:06:26,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:06:27,507 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-04-15 05:06:27,598 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_186, v_prenex_188], 6=[A, v_prenex_184]} [2021-04-15 05:06:27,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:27,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:27,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:27,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 05:06:27,611 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:27,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:27,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:27,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 7 [2021-04-15 05:06:27,622 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:27,839 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2021-04-15 05:06:27,839 INFO L628 ElimStorePlain]: treesize reduction 168, result has 46.7 percent of original size [2021-04-15 05:06:27,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:27,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:27,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-04-15 05:06:27,849 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:27,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:06:27,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:27,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:27,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:27,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:27,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-04-15 05:06:27,936 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:28,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:06:28,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:28,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:06:28,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-04-15 05:06:28,012 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:28,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:06:28,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-04-15 05:06:28,072 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:381, output treesize:42 [2021-04-15 05:06:28,166 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:06:28,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:06:28,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-04-15 05:06:28,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599336838] [2021-04-15 05:06:28,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:06:28,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:06:28,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:06:28,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:06:28,167 INFO L87 Difference]: Start difference. First operand 1734 states and 5855 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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) [2021-04-15 05:06:28,859 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 37 [2021-04-15 05:06:29,257 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 39 [2021-04-15 05:06:29,440 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 40 [2021-04-15 05:06:29,878 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 38 [2021-04-15 05:06:30,078 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 41 [2021-04-15 05:06:30,306 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 43 [2021-04-15 05:06:30,454 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 41 [2021-04-15 05:06:30,624 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 40 [2021-04-15 05:06:31,066 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2021-04-15 05:06:31,313 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 55 [2021-04-15 05:06:31,675 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 53 [2021-04-15 05:06:31,938 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 48 [2021-04-15 05:06:32,606 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-04-15 05:06:32,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:06:32,933 INFO L93 Difference]: Finished difference Result 2395 states and 7862 transitions. [2021-04-15 05:06:32,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 05:06:32,935 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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 26 [2021-04-15 05:06:32,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:06:32,939 INFO L225 Difference]: With dead ends: 2395 [2021-04-15 05:06:32,939 INFO L226 Difference]: Without dead ends: 2380 [2021-04-15 05:06:32,939 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 4756.8ms TimeCoverageRelationStatistics Valid=407, Invalid=1755, Unknown=0, NotChecked=0, Total=2162 [2021-04-15 05:06:32,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2380 states. [2021-04-15 05:06:32,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2380 to 1734. [2021-04-15 05:06:32,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1734 states, 1733 states have (on average 3.378534333525678) internal successors, (5855), 1733 states have internal predecessors, (5855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:06:32,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 5855 transitions. [2021-04-15 05:06:32,974 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 5855 transitions. Word has length 26 [2021-04-15 05:06:32,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:06:32,974 INFO L480 AbstractCegarLoop]: Abstraction has 1734 states and 5855 transitions. [2021-04-15 05:06:32,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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) [2021-04-15 05:06:32,974 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 5855 transitions. [2021-04-15 05:06:32,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:06:32,977 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:06:32,977 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:06:33,177 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1847,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:06:33,177 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:06:33,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:06:33,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1611336786, now seen corresponding path program 50 times [2021-04-15 05:06:33,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:06:33,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524998908] [2021-04-15 05:06:33,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:06:33,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:06:33,404 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-04-15 05:06:33,535 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-04-15 05:06:33,766 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-04-15 05:06:34,031 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:06:34,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524998908] [2021-04-15 05:06:34,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105977652] [2021-04-15 05:06:34,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:06:34,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:06:34,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:06:34,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:06:34,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:06:34,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:34,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:34,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:34,459 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-04-15 05:06:34,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 33 [2021-04-15 05:06:34,461 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:34,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:34,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:34,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:34,512 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-04-15 05:06:34,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 26 [2021-04-15 05:06:34,515 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:34,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:34,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:34,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:34,565 INFO L354 Elim1Store]: treesize reduction 24, result has 22.6 percent of original size [2021-04-15 05:06:34,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 25 [2021-04-15 05:06:34,568 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:34,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:34,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:34,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:34,613 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-04-15 05:06:34,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 30 [2021-04-15 05:06:34,616 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:34,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:34,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:34,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:34,649 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-04-15 05:06:34,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-04-15 05:06:34,650 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:34,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:34,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:34,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:34,702 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-04-15 05:06:34,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 26 [2021-04-15 05:06:34,704 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:34,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:34,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:34,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:34,757 INFO L354 Elim1Store]: treesize reduction 12, result has 61.3 percent of original size [2021-04-15 05:06:34,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-04-15 05:06:34,764 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:34,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:34,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:34,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:34,796 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-04-15 05:06:34,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-04-15 05:06:34,798 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:34,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:34,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:34,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:34,830 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-04-15 05:06:34,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-04-15 05:06:34,832 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:34,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:34,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:34,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:34,876 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-04-15 05:06:34,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 23 [2021-04-15 05:06:34,879 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:34,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:34,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:34,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:34,924 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:06:34,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 43 [2021-04-15 05:06:34,935 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:34,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:34,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:34,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:34,965 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-04-15 05:06:34,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-04-15 05:06:34,966 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:34,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:34,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:34,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:34,997 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-04-15 05:06:34,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-04-15 05:06:34,999 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:35,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:35,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:35,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:35,030 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-04-15 05:06:35,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-04-15 05:06:35,031 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:35,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:35,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:35,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:35,061 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-04-15 05:06:35,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-04-15 05:06:35,063 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:35,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:35,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:35,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:35,080 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-04-15 05:06:35,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-04-15 05:06:35,082 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:35,243 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2021-04-15 05:06:35,243 INFO L628 ElimStorePlain]: treesize reduction 76, result has 55.0 percent of original size [2021-04-15 05:06:35,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-04-15 05:06:35,245 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:753, output treesize:93 [2021-04-15 05:06:35,443 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:06:35,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:06:35,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2021-04-15 05:06:35,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254434275] [2021-04-15 05:06:35,443 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 05:06:35,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:06:35,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 05:06:35,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:06:35,444 INFO L87 Difference]: Start difference. First operand 1734 states and 5855 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 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) [2021-04-15 05:06:36,027 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2021-04-15 05:06:36,206 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2021-04-15 05:06:36,364 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 33 [2021-04-15 05:06:36,512 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-04-15 05:06:36,681 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 35 [2021-04-15 05:06:37,190 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 27 [2021-04-15 05:06:37,393 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-04-15 05:06:38,050 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2021-04-15 05:06:38,190 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 37 [2021-04-15 05:06:38,583 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-04-15 05:06:38,885 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 38 [2021-04-15 05:06:39,118 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-04-15 05:06:39,519 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2021-04-15 05:06:39,761 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2021-04-15 05:06:39,933 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-04-15 05:06:40,208 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2021-04-15 05:06:40,433 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2021-04-15 05:06:40,596 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 33 [2021-04-15 05:06:41,067 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-04-15 05:06:41,246 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 33 [2021-04-15 05:06:41,763 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-04-15 05:06:42,167 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-04-15 05:06:42,396 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 31 [2021-04-15 05:06:42,733 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-04-15 05:06:42,899 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 30 [2021-04-15 05:06:43,202 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 34 [2021-04-15 05:06:43,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:06:43,341 INFO L93 Difference]: Finished difference Result 3202 states and 10123 transitions. [2021-04-15 05:06:43,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-04-15 05:06:43,343 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 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 26 [2021-04-15 05:06:43,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:06:43,349 INFO L225 Difference]: With dead ends: 3202 [2021-04-15 05:06:43,349 INFO L226 Difference]: Without dead ends: 3138 [2021-04-15 05:06:43,350 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1142 ImplicationChecksByTransitivity, 7426.5ms TimeCoverageRelationStatistics Valid=727, Invalid=3055, Unknown=0, NotChecked=0, Total=3782 [2021-04-15 05:06:43,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3138 states. [2021-04-15 05:06:43,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3138 to 1784. [2021-04-15 05:06:43,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1784 states, 1783 states have (on average 3.378014582164891) internal successors, (6023), 1783 states have internal predecessors, (6023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:06:43,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1784 states to 1784 states and 6023 transitions. [2021-04-15 05:06:43,394 INFO L78 Accepts]: Start accepts. Automaton has 1784 states and 6023 transitions. Word has length 26 [2021-04-15 05:06:43,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:06:43,394 INFO L480 AbstractCegarLoop]: Abstraction has 1784 states and 6023 transitions. [2021-04-15 05:06:43,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 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) [2021-04-15 05:06:43,394 INFO L276 IsEmpty]: Start isEmpty. Operand 1784 states and 6023 transitions. [2021-04-15 05:06:43,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:06:43,397 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:06:43,397 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:06:43,597 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1861 [2021-04-15 05:06:43,598 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:06:43,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:06:43,598 INFO L82 PathProgramCache]: Analyzing trace with hash -696255298, now seen corresponding path program 51 times [2021-04-15 05:06:43,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:06:43,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112995774] [2021-04-15 05:06:43,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:06:43,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:06:44,258 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-04-15 05:06:44,431 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:06:44,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112995774] [2021-04-15 05:06:44,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749796490] [2021-04-15 05:06:44,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:06:44,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 05:06:44,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:06:44,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:06:44,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:06:45,359 WARN L205 SmtUtils]: Spent 531.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-04-15 05:06:45,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:45,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:45,910 INFO L354 Elim1Store]: treesize reduction 22, result has 46.3 percent of original size [2021-04-15 05:06:45,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 34 [2021-04-15 05:06:45,915 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:45,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:45,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:46,028 INFO L354 Elim1Store]: treesize reduction 18, result has 56.1 percent of original size [2021-04-15 05:06:46,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 41 [2021-04-15 05:06:46,036 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:46,931 WARN L205 SmtUtils]: Spent 895.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2021-04-15 05:06:46,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:06:46,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:46,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:47,018 INFO L354 Elim1Store]: treesize reduction 18, result has 56.1 percent of original size [2021-04-15 05:06:47,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 30 treesize of output 38 [2021-04-15 05:06:47,027 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:47,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:47,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:47,109 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-04-15 05:06:47,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 51 [2021-04-15 05:06:47,119 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:47,951 WARN L205 SmtUtils]: Spent 831.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2021-04-15 05:06:47,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:06:47,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:47,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:48,039 INFO L354 Elim1Store]: treesize reduction 14, result has 65.9 percent of original size [2021-04-15 05:06:48,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 45 [2021-04-15 05:06:48,046 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:48,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:48,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:48,105 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:06:48,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 59 [2021-04-15 05:06:48,121 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:50,445 WARN L205 SmtUtils]: Spent 2.32 s on a formula simplification. DAG size of input: 169 DAG size of output: 158 [2021-04-15 05:06:50,446 INFO L628 ElimStorePlain]: treesize reduction 75, result has 91.6 percent of original size [2021-04-15 05:06:50,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:50,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:50,530 INFO L354 Elim1Store]: treesize reduction 14, result has 65.9 percent of original size [2021-04-15 05:06:50,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 45 [2021-04-15 05:06:50,539 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:50,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:50,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:50,603 INFO L354 Elim1Store]: treesize reduction 18, result has 56.1 percent of original size [2021-04-15 05:06:50,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 38 [2021-04-15 05:06:50,611 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:51,360 WARN L205 SmtUtils]: Spent 748.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2021-04-15 05:06:51,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:06:51,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:51,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:51,449 INFO L354 Elim1Store]: treesize reduction 14, result has 65.9 percent of original size [2021-04-15 05:06:51,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 45 [2021-04-15 05:06:51,458 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:51,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:51,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:51,511 INFO L354 Elim1Store]: treesize reduction 31, result has 24.4 percent of original size [2021-04-15 05:06:51,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 28 [2021-04-15 05:06:51,514 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:52,314 WARN L205 SmtUtils]: Spent 799.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2021-04-15 05:06:52,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:06:52,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:52,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:52,386 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:06:52,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2021-04-15 05:06:52,408 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:52,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:52,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:52,473 INFO L354 Elim1Store]: treesize reduction 18, result has 56.1 percent of original size [2021-04-15 05:06:52,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 38 [2021-04-15 05:06:52,481 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:53,130 WARN L205 SmtUtils]: Spent 648.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-04-15 05:06:53,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:06:53,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:53,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:53,213 INFO L354 Elim1Store]: treesize reduction 14, result has 65.9 percent of original size [2021-04-15 05:06:53,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 45 [2021-04-15 05:06:53,221 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:53,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:53,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:53,296 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-04-15 05:06:53,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 47 [2021-04-15 05:06:53,306 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:54,585 WARN L205 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 132 DAG size of output: 130 [2021-04-15 05:06:54,586 INFO L628 ElimStorePlain]: treesize reduction 17, result has 97.5 percent of original size [2021-04-15 05:06:54,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:54,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:54,666 INFO L354 Elim1Store]: treesize reduction 22, result has 46.3 percent of original size [2021-04-15 05:06:54,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 34 [2021-04-15 05:06:54,674 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:54,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:54,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:06:54,749 INFO L354 Elim1Store]: treesize reduction 18, result has 56.1 percent of original size [2021-04-15 05:06:54,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 38 [2021-04-15 05:06:54,760 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-04-15 05:06:56,071 WARN L205 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 122 DAG size of output: 119 [2021-04-15 05:06:56,072 INFO L628 ElimStorePlain]: treesize reduction 46, result has 92.9 percent of original size [2021-04-15 05:06:56,101 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 14 xjuncts. [2021-04-15 05:06:56,101 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:953, output treesize:1025 [2021-04-15 05:06:56,913 WARN L205 SmtUtils]: Spent 730.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 45 [2021-04-15 05:06:57,175 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-04-15 05:06:57,248 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:06:57,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:06:57,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-04-15 05:06:57,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943765604] [2021-04-15 05:06:57,248 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 05:06:57,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:06:57,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 05:06:57,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-04-15 05:06:57,249 INFO L87 Difference]: Start difference. First operand 1784 states and 6023 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:06:57,505 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 25 [2021-04-15 05:06:57,661 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 25 [2021-04-15 05:06:58,036 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 39 [2021-04-15 05:06:58,299 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 35 [2021-04-15 05:06:58,455 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 29 [2021-04-15 05:06:58,636 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 29 [2021-04-15 05:06:58,830 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 38 [2021-04-15 05:06:59,003 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 25 [2021-04-15 05:06:59,308 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 38 [2021-04-15 05:06:59,512 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 36 [2021-04-15 05:06:59,697 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-04-15 05:06:59,832 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 30 [2021-04-15 05:07:00,038 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2021-04-15 05:07:00,432 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-04-15 05:07:00,635 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-04-15 05:07:00,810 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-04-15 05:07:01,006 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 39 [2021-04-15 05:07:01,322 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2021-04-15 05:07:01,855 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 32 [2021-04-15 05:07:02,185 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-04-15 05:07:02,602 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-04-15 05:07:02,920 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2021-04-15 05:07:03,651 WARN L205 SmtUtils]: Spent 552.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 45 [2021-04-15 05:07:07,520 WARN L205 SmtUtils]: Spent 3.68 s on a formula simplification. DAG size of input: 81 DAG size of output: 68 [2021-04-15 05:07:07,806 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 31 [2021-04-15 05:07:07,995 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-04-15 05:07:08,507 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 40 [2021-04-15 05:07:14,925 WARN L205 SmtUtils]: Spent 6.21 s on a formula simplification. DAG size of input: 121 DAG size of output: 69 [2021-04-15 05:07:15,195 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-04-15 05:07:15,892 WARN L205 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-04-15 05:07:16,411 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2021-04-15 05:07:16,689 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 30 [2021-04-15 05:07:16,939 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 34 [2021-04-15 05:07:17,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:07:17,146 INFO L93 Difference]: Finished difference Result 2935 states and 9497 transitions. [2021-04-15 05:07:17,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-04-15 05:07:17,147 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:07:17,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:07:17,153 INFO L225 Difference]: With dead ends: 2935 [2021-04-15 05:07:17,153 INFO L226 Difference]: Without dead ends: 2890 [2021-04-15 05:07:17,153 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1011 ImplicationChecksByTransitivity, 20576.5ms TimeCoverageRelationStatistics Valid=621, Invalid=2919, Unknown=0, NotChecked=0, Total=3540 [2021-04-15 05:07:17,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2890 states. [2021-04-15 05:07:17,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2890 to 1811. [2021-04-15 05:07:17,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1811 states, 1810 states have (on average 3.387292817679558) internal successors, (6131), 1810 states have internal predecessors, (6131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:07:17,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1811 states to 1811 states and 6131 transitions. [2021-04-15 05:07:17,183 INFO L78 Accepts]: Start accepts. Automaton has 1811 states and 6131 transitions. Word has length 26 [2021-04-15 05:07:17,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:07:17,183 INFO L480 AbstractCegarLoop]: Abstraction has 1811 states and 6131 transitions. [2021-04-15 05:07:17,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:07:17,183 INFO L276 IsEmpty]: Start isEmpty. Operand 1811 states and 6131 transitions. [2021-04-15 05:07:17,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:07:17,185 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:07:17,185 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:07:17,386 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1886 [2021-04-15 05:07:17,386 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:07:17,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:07:17,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1813857782, now seen corresponding path program 52 times [2021-04-15 05:07:17,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:07:17,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277789271] [2021-04-15 05:07:17,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:07:17,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:07:17,662 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 35 [2021-04-15 05:07:17,833 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-04-15 05:07:18,029 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 32 [2021-04-15 05:07:18,176 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-04-15 05:07:18,451 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:07:18,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277789271] [2021-04-15 05:07:18,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558965258] [2021-04-15 05:07:18,452 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:07:18,475 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:07:18,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:07:18,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:07:18,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:07:19,232 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-04-15 05:07:19,499 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_212], 6=[v_prenex_210, v_prenex_214]} [2021-04-15 05:07:19,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:07:19,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:07:19,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:07:19,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:07:19,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 05:07:19,521 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:07:19,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:07:19,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:07:19,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:07:19,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 13 [2021-04-15 05:07:19,539 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:07:19,805 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-04-15 05:07:19,806 INFO L628 ElimStorePlain]: treesize reduction 154, result has 43.2 percent of original size [2021-04-15 05:07:19,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:07:19,814 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 13 treesize of output 7 [2021-04-15 05:07:19,817 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:07:19,904 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:07:19,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:07:19,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:07:19,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:07:19,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:07:19,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-04-15 05:07:19,928 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:07:20,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:07:20,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:07:20,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:07:20,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:07:20,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-04-15 05:07:20,036 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:07:20,107 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:07:20,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-04-15 05:07:20,109 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:337, output treesize:55 [2021-04-15 05:07:20,224 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:07:20,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:07:20,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-04-15 05:07:20,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502394425] [2021-04-15 05:07:20,224 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:07:20,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:07:20,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:07:20,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:07:20,225 INFO L87 Difference]: Start difference. First operand 1811 states and 6131 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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) [2021-04-15 05:07:20,843 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 24 [2021-04-15 05:07:21,264 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 32 [2021-04-15 05:07:21,458 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 28 [2021-04-15 05:07:21,661 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 26 [2021-04-15 05:07:22,063 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 33 [2021-04-15 05:07:22,289 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 35 [2021-04-15 05:07:22,569 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-04-15 05:07:22,915 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-04-15 05:07:23,227 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 37 [2021-04-15 05:07:23,412 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2021-04-15 05:07:23,738 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-04-15 05:07:24,028 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2021-04-15 05:07:24,345 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 37 [2021-04-15 05:07:24,730 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 48 [2021-04-15 05:07:25,232 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 43 [2021-04-15 05:07:25,576 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 44 [2021-04-15 05:07:25,892 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-04-15 05:07:26,590 WARN L205 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2021-04-15 05:07:27,115 WARN L205 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2021-04-15 05:07:27,744 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2021-04-15 05:07:27,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:07:27,818 INFO L93 Difference]: Finished difference Result 2331 states and 7684 transitions. [2021-04-15 05:07:27,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-04-15 05:07:27,822 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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 26 [2021-04-15 05:07:27,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:07:27,827 INFO L225 Difference]: With dead ends: 2331 [2021-04-15 05:07:27,827 INFO L226 Difference]: Without dead ends: 2316 [2021-04-15 05:07:27,827 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 7644.3ms TimeCoverageRelationStatistics Valid=421, Invalid=1835, Unknown=0, NotChecked=0, Total=2256 [2021-04-15 05:07:27,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2316 states. [2021-04-15 05:07:27,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2316 to 1809. [2021-04-15 05:07:27,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1809 states, 1808 states have (on average 3.3871681415929205) internal successors, (6124), 1808 states have internal predecessors, (6124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:07:27,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1809 states to 1809 states and 6124 transitions. [2021-04-15 05:07:27,852 INFO L78 Accepts]: Start accepts. Automaton has 1809 states and 6124 transitions. Word has length 26 [2021-04-15 05:07:27,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:07:27,852 INFO L480 AbstractCegarLoop]: Abstraction has 1809 states and 6124 transitions. [2021-04-15 05:07:27,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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) [2021-04-15 05:07:27,852 INFO L276 IsEmpty]: Start isEmpty. Operand 1809 states and 6124 transitions. [2021-04-15 05:07:27,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:07:27,857 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:07:27,858 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:07:28,058 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1971,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:07:28,058 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:07:28,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:07:28,058 INFO L82 PathProgramCache]: Analyzing trace with hash -782211534, now seen corresponding path program 53 times [2021-04-15 05:07:28,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:07:28,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041450052] [2021-04-15 05:07:28,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:07:28,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:07:28,399 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-04-15 05:07:28,533 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-04-15 05:07:28,746 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2021-04-15 05:07:28,980 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2021-04-15 05:07:29,161 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2021-04-15 05:07:29,305 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:07:29,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041450052] [2021-04-15 05:07:29,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204703799] [2021-04-15 05:07:29,306 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:07:29,332 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 05:07:29,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:07:29,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:07:29,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:07:32,409 WARN L205 SmtUtils]: Spent 582.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-04-15 05:07:32,894 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-04-15 05:07:33,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:07:33,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:07:33,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:07:33,478 INFO L354 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2021-04-15 05:07:33,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 30 [2021-04-15 05:07:33,483 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:07:33,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:07:33,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:07:33,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:07:33,553 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:07:33,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 45 [2021-04-15 05:07:33,573 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:07:34,724 WARN L205 SmtUtils]: Spent 1.15 s on a formula simplification that was a NOOP. DAG size: 164 [2021-04-15 05:07:34,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:07:34,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:07:34,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:07:34,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:07:34,822 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:07:34,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 51 [2021-04-15 05:07:34,833 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:07:34,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:07:34,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:07:34,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:07:34,907 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-04-15 05:07:34,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 37 [2021-04-15 05:07:34,917 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:07:38,071 WARN L205 SmtUtils]: Spent 3.15 s on a formula simplification. DAG size of input: 164 DAG size of output: 155 [2021-04-15 05:07:38,072 INFO L628 ElimStorePlain]: treesize reduction 48, result has 94.7 percent of original size [2021-04-15 05:07:38,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:07:38,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:07:38,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:07:38,168 INFO L354 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2021-04-15 05:07:38,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 33 [2021-04-15 05:07:38,173 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:07:38,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:07:38,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:07:38,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:07:38,253 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-04-15 05:07:38,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 37 [2021-04-15 05:07:38,264 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:07:40,017 WARN L205 SmtUtils]: Spent 1.75 s on a formula simplification. DAG size of input: 146 DAG size of output: 143 [2021-04-15 05:07:40,019 INFO L628 ElimStorePlain]: treesize reduction 42, result has 94.8 percent of original size [2021-04-15 05:07:40,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:07:40,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:07:40,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:07:40,106 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-04-15 05:07:40,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 37 [2021-04-15 05:07:40,113 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:07:40,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:07:40,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:07:40,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:07:40,177 INFO L354 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2021-04-15 05:07:40,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 30 [2021-04-15 05:07:40,181 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:07:40,978 WARN L205 SmtUtils]: Spent 796.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2021-04-15 05:07:40,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:07:40,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:07:41,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:07:41,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:07:41,067 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:07:41,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 51 [2021-04-15 05:07:41,083 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:07:41,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:07:41,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:07:41,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:07:41,119 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-04-15 05:07:41,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 1 [2021-04-15 05:07:41,121 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:07:41,898 WARN L205 SmtUtils]: Spent 776.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 05:07:41,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:07:41,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:07:41,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:07:41,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:07:41,993 INFO L354 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2021-04-15 05:07:41,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 30 [2021-04-15 05:07:41,998 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:07:42,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:07:42,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:07:42,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:07:42,072 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-04-15 05:07:42,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 37 [2021-04-15 05:07:42,076 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:07:42,787 WARN L205 SmtUtils]: Spent 710.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-04-15 05:07:42,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:07:42,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:07:42,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:07:42,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:07:42,875 INFO L354 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2021-04-15 05:07:42,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 30 [2021-04-15 05:07:42,880 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:07:42,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:07:42,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:07:42,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:07:42,955 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-04-15 05:07:42,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-04-15 05:07:42,969 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:07:44,273 WARN L205 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 112 DAG size of output: 109 [2021-04-15 05:07:44,274 INFO L628 ElimStorePlain]: treesize reduction 42, result has 92.7 percent of original size [2021-04-15 05:07:44,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:07:44,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:07:44,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:07:44,358 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-04-15 05:07:44,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 34 [2021-04-15 05:07:44,369 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:07:44,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:07:44,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:07:44,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:07:44,454 INFO L354 Elim1Store]: treesize reduction 4, result has 87.9 percent of original size [2021-04-15 05:07:44,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 47 [2021-04-15 05:07:44,465 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-04-15 05:07:45,086 WARN L205 SmtUtils]: Spent 620.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-04-15 05:07:45,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:07:45,113 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-04-15 05:07:45,113 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:953, output treesize:554 [2021-04-15 05:07:45,500 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 25 [2021-04-15 05:07:45,673 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:07:45,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:07:45,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-04-15 05:07:45,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551421636] [2021-04-15 05:07:45,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 05:07:45,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:07:45,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 05:07:45,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=389, Unknown=1, NotChecked=0, Total=462 [2021-04-15 05:07:45,675 INFO L87 Difference]: Start difference. First operand 1809 states and 6124 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:07:46,124 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 25 [2021-04-15 05:07:46,285 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 27 [2021-04-15 05:07:46,827 WARN L205 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2021-04-15 05:07:47,094 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 35 [2021-04-15 05:07:47,716 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2021-04-15 05:07:48,336 WARN L205 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2021-04-15 05:07:48,616 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 36 [2021-04-15 05:07:48,977 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-04-15 05:07:49,523 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-04-15 05:07:49,796 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2021-04-15 05:07:50,011 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-04-15 05:07:50,311 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 44 [2021-04-15 05:07:50,784 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-04-15 05:07:51,182 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2021-04-15 05:07:51,546 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-04-15 05:07:58,486 WARN L205 SmtUtils]: Spent 6.58 s on a formula simplification. DAG size of input: 86 DAG size of output: 68 [2021-04-15 05:07:58,718 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 32 [2021-04-15 05:07:58,985 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-04-15 05:08:04,974 WARN L205 SmtUtils]: Spent 5.74 s on a formula simplification. DAG size of input: 93 DAG size of output: 69 [2021-04-15 05:08:17,249 WARN L205 SmtUtils]: Spent 12.10 s on a formula simplification. DAG size of input: 181 DAG size of output: 117 [2021-04-15 05:08:18,245 WARN L205 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2021-04-15 05:08:18,546 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-04-15 05:08:19,031 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2021-04-15 05:08:19,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:08:19,326 INFO L93 Difference]: Finished difference Result 2608 states and 8601 transitions. [2021-04-15 05:08:19,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-04-15 05:08:19,329 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:08:19,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:08:19,334 INFO L225 Difference]: With dead ends: 2608 [2021-04-15 05:08:19,334 INFO L226 Difference]: Without dead ends: 2578 [2021-04-15 05:08:19,334 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 36014.3ms TimeCoverageRelationStatistics Valid=430, Invalid=2119, Unknown=1, NotChecked=0, Total=2550 [2021-04-15 05:08:19,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2578 states. [2021-04-15 05:08:19,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2578 to 1812. [2021-04-15 05:08:19,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1812 states, 1811 states have (on average 3.3881833241303148) internal successors, (6136), 1811 states have internal predecessors, (6136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:08:19,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1812 states to 1812 states and 6136 transitions. [2021-04-15 05:08:19,359 INFO L78 Accepts]: Start accepts. Automaton has 1812 states and 6136 transitions. Word has length 26 [2021-04-15 05:08:19,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:08:19,359 INFO L480 AbstractCegarLoop]: Abstraction has 1812 states and 6136 transitions. [2021-04-15 05:08:19,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:08:19,359 INFO L276 IsEmpty]: Start isEmpty. Operand 1812 states and 6136 transitions. [2021-04-15 05:08:19,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:08:19,362 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:08:19,362 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:08:19,562 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1985 [2021-04-15 05:08:19,563 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:08:19,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:08:19,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1072819888, now seen corresponding path program 54 times [2021-04-15 05:08:19,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:08:19,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772904479] [2021-04-15 05:08:19,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:08:19,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:08:19,975 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-04-15 05:08:20,288 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 29 [2021-04-15 05:08:20,672 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 33 [2021-04-15 05:08:20,977 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-04-15 05:08:21,200 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-04-15 05:08:21,370 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:08:21,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772904479] [2021-04-15 05:08:21,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935583743] [2021-04-15 05:08:21,370 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:08:21,403 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 05:08:21,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:08:21,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:08:21,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:08:21,847 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-04-15 05:08:22,182 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-04-15 05:08:22,505 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-04-15 05:08:23,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:23,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:23,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:08:23,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:08:23,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:08:23,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:08:23,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-04-15 05:08:23,597 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:08:23,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:23,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:23,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:08:23,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:08:23,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:08:23,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:08:23,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-04-15 05:08:23,638 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:08:23,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:23,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:23,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:08:23,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:08:23,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:08:23,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:08:23,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-04-15 05:08:23,677 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:08:23,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:23,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:23,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:08:23,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:08:23,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:08:23,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:08:23,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-04-15 05:08:23,717 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:08:23,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:23,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:23,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:08:23,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:08:23,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:08:23,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:08:23,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-04-15 05:08:23,767 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:08:23,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:23,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:23,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:08:23,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:08:23,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:08:23,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:08:23,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-04-15 05:08:23,805 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:08:23,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:23,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:23,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:08:23,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:08:23,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:08:23,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:08:23,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-04-15 05:08:23,849 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:08:23,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:23,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:23,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:08:23,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:08:23,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:08:23,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:08:23,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-04-15 05:08:23,888 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:08:23,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:23,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:23,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:08:23,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:08:23,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:08:23,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:08:23,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-04-15 05:08:23,930 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:08:23,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:23,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:23,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:08:23,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:08:23,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:08:23,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:08:23,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-04-15 05:08:23,974 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:08:23,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:23,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:23,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:08:23,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:08:24,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:08:24,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:08:24,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-04-15 05:08:24,017 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:08:24,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:24,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:24,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:08:24,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:08:24,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:08:24,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:08:24,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-04-15 05:08:24,065 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:08:24,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:24,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:24,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:08:24,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:08:24,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:08:24,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:08:24,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-04-15 05:08:24,095 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:08:24,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:24,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:24,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:08:24,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:08:24,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:08:24,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:08:24,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-04-15 05:08:24,126 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:08:24,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:24,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:24,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:08:24,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:08:24,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-04-15 05:08:24,144 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:08:24,248 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 16 [2021-04-15 05:08:24,249 INFO L628 ElimStorePlain]: treesize reduction 16, result has 62.8 percent of original size [2021-04-15 05:08:24,252 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 05:08:24,253 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-04-15 05:08:24,402 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:08:24,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:08:24,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-04-15 05:08:24,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112326263] [2021-04-15 05:08:24,402 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:08:24,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:08:24,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:08:24,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:08:24,403 INFO L87 Difference]: Start difference. First operand 1812 states and 6136 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:08:24,612 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 21 [2021-04-15 05:08:24,925 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2021-04-15 05:08:25,228 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-04-15 05:08:25,559 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-04-15 05:08:25,749 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-04-15 05:08:26,100 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 47 [2021-04-15 05:08:26,431 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 44 [2021-04-15 05:08:26,782 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-04-15 05:08:27,097 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 39 [2021-04-15 05:08:27,425 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-04-15 05:08:27,990 WARN L205 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-04-15 05:08:28,428 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-04-15 05:08:28,743 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-04-15 05:08:29,310 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2021-04-15 05:08:29,666 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2021-04-15 05:08:30,019 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-04-15 05:08:30,640 WARN L205 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2021-04-15 05:08:31,079 WARN L205 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-04-15 05:08:31,644 WARN L205 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2021-04-15 05:08:32,186 WARN L205 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2021-04-15 05:08:32,826 WARN L205 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2021-04-15 05:08:33,694 WARN L205 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-04-15 05:08:34,355 WARN L205 SmtUtils]: Spent 530.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2021-04-15 05:08:35,188 WARN L205 SmtUtils]: Spent 749.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-04-15 05:08:36,313 WARN L205 SmtUtils]: Spent 644.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 55 [2021-04-15 05:08:37,131 WARN L205 SmtUtils]: Spent 733.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2021-04-15 05:08:38,349 WARN L205 SmtUtils]: Spent 1.00 s on a formula simplification. DAG size of input: 77 DAG size of output: 55 [2021-04-15 05:08:39,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:08:39,200 INFO L93 Difference]: Finished difference Result 2406 states and 7706 transitions. [2021-04-15 05:08:39,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-04-15 05:08:39,203 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:08:39,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:08:39,207 INFO L225 Difference]: With dead ends: 2406 [2021-04-15 05:08:39,207 INFO L226 Difference]: Without dead ends: 2376 [2021-04-15 05:08:39,208 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 14594.9ms TimeCoverageRelationStatistics Valid=436, Invalid=1820, Unknown=0, NotChecked=0, Total=2256 [2021-04-15 05:08:39,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2376 states. [2021-04-15 05:08:39,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2376 to 1827. [2021-04-15 05:08:39,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1827 states, 1826 states have (on average 3.394852135815991) internal successors, (6199), 1826 states have internal predecessors, (6199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:08:39,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1827 states to 1827 states and 6199 transitions. [2021-04-15 05:08:39,232 INFO L78 Accepts]: Start accepts. Automaton has 1827 states and 6199 transitions. Word has length 26 [2021-04-15 05:08:39,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:08:39,232 INFO L480 AbstractCegarLoop]: Abstraction has 1827 states and 6199 transitions. [2021-04-15 05:08:39,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:08:39,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1827 states and 6199 transitions. [2021-04-15 05:08:39,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:08:39,235 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:08:39,235 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:08:39,435 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2055,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:08:39,436 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:08:39,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:08:39,436 INFO L82 PathProgramCache]: Analyzing trace with hash 376151132, now seen corresponding path program 55 times [2021-04-15 05:08:39,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:08:39,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517544873] [2021-04-15 05:08:39,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:08:39,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:08:39,868 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-04-15 05:08:40,132 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 27 [2021-04-15 05:08:40,467 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 32 [2021-04-15 05:08:40,757 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-04-15 05:08:40,926 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2021-04-15 05:08:41,054 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:08:41,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517544873] [2021-04-15 05:08:41,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736791623] [2021-04-15 05:08:41,054 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:08:41,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:08:41,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:08:41,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:08:41,763 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-04-15 05:08:41,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:41,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:41,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:41,979 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-04-15 05:08:41,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 33 [2021-04-15 05:08:41,985 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:08:42,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:42,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:42,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:42,081 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-04-15 05:08:42,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 26 [2021-04-15 05:08:42,085 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:08:42,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:42,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:42,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:42,184 INFO L354 Elim1Store]: treesize reduction 24, result has 22.6 percent of original size [2021-04-15 05:08:42,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 25 [2021-04-15 05:08:42,189 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:08:42,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:42,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:42,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:42,301 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-04-15 05:08:42,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 30 [2021-04-15 05:08:42,308 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:08:42,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:42,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:42,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:42,379 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-04-15 05:08:42,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-04-15 05:08:42,382 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:08:42,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:42,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:42,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:42,497 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-04-15 05:08:42,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 26 [2021-04-15 05:08:42,501 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:08:42,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:42,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:42,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:42,632 INFO L354 Elim1Store]: treesize reduction 12, result has 61.3 percent of original size [2021-04-15 05:08:42,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-04-15 05:08:42,649 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:08:42,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:42,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:42,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:42,719 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-04-15 05:08:42,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-04-15 05:08:42,723 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:08:42,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:42,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:42,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:42,797 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-04-15 05:08:42,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-04-15 05:08:42,801 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:08:42,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:42,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:42,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:42,924 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-04-15 05:08:42,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 23 [2021-04-15 05:08:42,930 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:08:42,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:42,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:42,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:43,037 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:08:43,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 43 [2021-04-15 05:08:43,063 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:08:43,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:43,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:43,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:43,127 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-04-15 05:08:43,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-04-15 05:08:43,130 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:08:43,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:43,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:43,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:43,197 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-04-15 05:08:43,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-04-15 05:08:43,201 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:08:43,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:43,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:43,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:43,266 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-04-15 05:08:43,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-04-15 05:08:43,269 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:08:43,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:43,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:43,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:43,334 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-04-15 05:08:43,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-04-15 05:08:43,337 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:08:43,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:43,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:43,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:08:43,374 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-04-15 05:08:43,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-04-15 05:08:43,377 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-04-15 05:08:43,755 WARN L205 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2021-04-15 05:08:43,756 INFO L628 ElimStorePlain]: treesize reduction 76, result has 55.0 percent of original size [2021-04-15 05:08:43,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-04-15 05:08:43,758 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:753, output treesize:93 [2021-04-15 05:08:44,009 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2021-04-15 05:08:44,206 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:08:44,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:08:44,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-04-15 05:08:44,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227553219] [2021-04-15 05:08:44,206 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:08:44,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:08:44,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:08:44,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:08:44,207 INFO L87 Difference]: Start difference. First operand 1827 states and 6199 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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) [2021-04-15 05:08:44,571 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 26 [2021-04-15 05:08:44,763 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 20 [2021-04-15 05:08:45,093 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 32 [2021-04-15 05:08:45,481 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 32 [2021-04-15 05:08:45,900 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 35 [2021-04-15 05:08:46,205 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 31 [2021-04-15 05:08:46,415 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-04-15 05:08:46,928 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-04-15 05:08:47,318 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 36 [2021-04-15 05:08:47,688 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 35 [2021-04-15 05:08:48,041 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 29 [2021-04-15 05:08:48,807 WARN L205 SmtUtils]: Spent 700.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2021-04-15 05:08:49,144 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2021-04-15 05:08:49,601 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-04-15 05:08:50,081 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 38 [2021-04-15 05:08:50,474 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2021-04-15 05:08:51,258 WARN L205 SmtUtils]: Spent 560.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2021-04-15 05:08:52,211 WARN L205 SmtUtils]: Spent 802.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2021-04-15 05:08:52,487 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-04-15 05:08:52,962 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2021-04-15 05:08:53,544 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 37 [2021-04-15 05:08:54,044 WARN L205 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 45 [2021-04-15 05:08:54,280 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2021-04-15 05:08:54,783 WARN L205 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2021-04-15 05:08:55,484 WARN L205 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 44 [2021-04-15 05:08:56,277 WARN L205 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-04-15 05:08:56,746 WARN L205 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-04-15 05:08:57,733 WARN L205 SmtUtils]: Spent 647.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-04-15 05:08:58,464 WARN L205 SmtUtils]: Spent 560.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2021-04-15 05:08:59,156 WARN L205 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2021-04-15 05:09:00,230 WARN L205 SmtUtils]: Spent 836.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 54 [2021-04-15 05:09:01,168 WARN L205 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2021-04-15 05:09:01,472 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 25 [2021-04-15 05:09:02,242 WARN L205 SmtUtils]: Spent 697.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2021-04-15 05:09:02,982 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 32 [2021-04-15 05:09:03,367 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2021-04-15 05:09:03,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:09:03,476 INFO L93 Difference]: Finished difference Result 3227 states and 10321 transitions. [2021-04-15 05:09:03,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-04-15 05:09:03,479 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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 26 [2021-04-15 05:09:03,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:09:03,486 INFO L225 Difference]: With dead ends: 3227 [2021-04-15 05:09:03,486 INFO L226 Difference]: Without dead ends: 3193 [2021-04-15 05:09:03,487 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1008 ImplicationChecksByTransitivity, 18490.2ms TimeCoverageRelationStatistics Valid=711, Invalid=2595, Unknown=0, NotChecked=0, Total=3306 [2021-04-15 05:09:03,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3193 states. [2021-04-15 05:09:03,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3193 to 1832. [2021-04-15 05:09:03,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1832 states, 1831 states have (on average 3.399235390496996) internal successors, (6224), 1831 states have internal predecessors, (6224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:09:03,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1832 states to 1832 states and 6224 transitions. [2021-04-15 05:09:03,522 INFO L78 Accepts]: Start accepts. Automaton has 1832 states and 6224 transitions. Word has length 26 [2021-04-15 05:09:03,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:09:03,522 INFO L480 AbstractCegarLoop]: Abstraction has 1832 states and 6224 transitions. [2021-04-15 05:09:03,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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) [2021-04-15 05:09:03,522 INFO L276 IsEmpty]: Start isEmpty. Operand 1832 states and 6224 transitions. [2021-04-15 05:09:03,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:09:03,525 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:09:03,525 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:09:03,725 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2169 [2021-04-15 05:09:03,726 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:09:03,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:09:03,726 INFO L82 PathProgramCache]: Analyzing trace with hash 871796194, now seen corresponding path program 28 times [2021-04-15 05:09:03,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:09:03,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309695809] [2021-04-15 05:09:03,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:09:03,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:09:04,338 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-04-15 05:09:04,667 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-04-15 05:09:04,932 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2021-04-15 05:09:05,134 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2021-04-15 05:09:05,340 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-04-15 05:09:05,343 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:09:05,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309695809] [2021-04-15 05:09:05,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752973106] [2021-04-15 05:09:05,344 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:09:05,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:09:05,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:09:05,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:09:05,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:09:05,959 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-04-15 05:09:06,250 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-04-15 05:09:06,502 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-04-15 05:09:06,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:09:06,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:09:06,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:09:06,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:09:06,947 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:09:06,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:09:06,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:09:06,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:09:06,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-04-15 05:09:06,972 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:09:06,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:09:06,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:09:06,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:09:06,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:09:07,003 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:09:07,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:09:07,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:09:07,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:09:07,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:09:07,028 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:09:07,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:09:07,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:09:07,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:09:07,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-04-15 05:09:07,053 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:09:07,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:09:07,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:09:07,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:09:07,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:09:07,079 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:09:07,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:09:07,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:09:07,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:09:07,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-04-15 05:09:07,111 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:09:07,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:09:07,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:09:07,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:09:07,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-04-15 05:09:07,147 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:09:07,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:09:07,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:09:07,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:09:07,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-04-15 05:09:07,171 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:09:07,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:09:07,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:09:07,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:09:07,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:09:07,198 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:09:07,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:09:07,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:09:07,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:09:07,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:09:07,222 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:09:07,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:09:07,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:09:07,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:09:07,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:09:07,244 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:09:07,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:09:07,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:09:07,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:09:07,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-04-15 05:09:07,265 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:09:07,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:09:07,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:09:07,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:09:07,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:09:07,286 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:09:07,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:09:07,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:09:07,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-04-15 05:09:07,303 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:09:07,664 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-04-15 05:09:07,665 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-04-15 05:09:07,669 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-04-15 05:09:07,670 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-04-15 05:09:07,873 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2021-04-15 05:09:07,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:09:07,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:09:07,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-04-15 05:09:07,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635695679] [2021-04-15 05:09:07,913 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:09:07,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:09:07,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:09:07,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:09:07,913 INFO L87 Difference]: Start difference. First operand 1832 states and 6224 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:09:08,305 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 28 [2021-04-15 05:09:09,006 WARN L205 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-04-15 05:09:09,188 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-04-15 05:09:09,517 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 35 [2021-04-15 05:09:10,272 WARN L205 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2021-04-15 05:09:11,038 WARN L205 SmtUtils]: Spent 556.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2021-04-15 05:09:11,702 WARN L205 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-04-15 05:09:12,007 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-04-15 05:09:12,848 WARN L205 SmtUtils]: Spent 731.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-04-15 05:09:13,548 WARN L205 SmtUtils]: Spent 627.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2021-04-15 05:09:14,012 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-04-15 05:09:14,893 WARN L205 SmtUtils]: Spent 533.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 52 [2021-04-15 05:09:15,124 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-04-15 05:09:15,788 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-04-15 05:09:16,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:09:16,402 INFO L93 Difference]: Finished difference Result 2398 states and 7951 transitions. [2021-04-15 05:09:16,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 05:09:16,405 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:09:16,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:09:16,410 INFO L225 Difference]: With dead ends: 2398 [2021-04-15 05:09:16,410 INFO L226 Difference]: Without dead ends: 2383 [2021-04-15 05:09:16,411 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 8872.7ms TimeCoverageRelationStatistics Valid=195, Invalid=995, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 05:09:16,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2383 states. [2021-04-15 05:09:16,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2383 to 1847. [2021-04-15 05:09:16,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1847 states, 1846 states have (on average 3.397074756229686) internal successors, (6271), 1846 states have internal predecessors, (6271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:09:16,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1847 states to 1847 states and 6271 transitions. [2021-04-15 05:09:16,438 INFO L78 Accepts]: Start accepts. Automaton has 1847 states and 6271 transitions. Word has length 26 [2021-04-15 05:09:16,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:09:16,438 INFO L480 AbstractCegarLoop]: Abstraction has 1847 states and 6271 transitions. [2021-04-15 05:09:16,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:09:16,439 INFO L276 IsEmpty]: Start isEmpty. Operand 1847 states and 6271 transitions. [2021-04-15 05:09:16,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:09:16,441 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:09:16,441 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:09:16,643 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2194,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:09:16,643 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:09:16,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:09:16,643 INFO L82 PathProgramCache]: Analyzing trace with hash 224636922, now seen corresponding path program 29 times [2021-04-15 05:09:16,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:09:16,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025004627] [2021-04-15 05:09:16,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:09:16,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:09:17,079 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-04-15 05:09:17,371 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-04-15 05:09:17,631 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2021-04-15 05:09:17,839 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-04-15 05:09:17,977 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:09:17,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025004627] [2021-04-15 05:09:17,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61946702] [2021-04-15 05:09:17,978 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:09:18,001 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 05:09:18,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:09:18,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:09:18,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:09:18,566 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-04-15 05:09:18,820 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-04-15 05:09:18,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:09:18,954 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:09:18,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:09:18,958 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:09:18,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:09:18,993 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:09:18,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:09:18,998 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:09:19,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:09:19,051 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:09:19,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-04-15 05:09:19,058 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:09:19,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:09:19,093 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:09:19,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:09:19,097 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:09:19,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:09:19,152 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:09:19,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-04-15 05:09:19,160 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:09:19,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:09:19,216 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:09:19,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-04-15 05:09:19,221 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:09:19,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:09:19,258 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:09:19,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:09:19,262 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:09:19,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:09:19,321 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:09:19,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-04-15 05:09:19,326 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:09:19,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:09:19,360 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:09:19,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-04-15 05:09:19,379 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:09:19,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:09:19,427 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:09:19,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-04-15 05:09:19,444 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:09:19,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:09:19,478 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:09:19,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-04-15 05:09:19,482 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:09:19,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:09:19,534 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:09:19,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-04-15 05:09:19,544 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:09:19,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:09:19,603 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:09:19,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-04-15 05:09:19,609 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:09:19,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:09:19,656 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:09:19,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-04-15 05:09:19,674 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:09:19,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:09:19,721 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:09:19,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-04-15 05:09:19,725 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:09:19,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:09:19,751 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:09:19,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-04-15 05:09:19,756 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-04-15 05:09:20,088 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-04-15 05:09:20,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:09:20,092 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-04-15 05:09:20,092 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-04-15 05:09:20,508 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-04-15 05:09:20,865 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 20 [2021-04-15 05:09:20,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:09:20,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:09:20,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-04-15 05:09:20,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651053942] [2021-04-15 05:09:20,923 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:09:20,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:09:20,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:09:20,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:09:20,924 INFO L87 Difference]: Start difference. First operand 1847 states and 6271 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:09:21,421 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 28 [2021-04-15 05:09:22,408 WARN L205 SmtUtils]: Spent 648.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2021-04-15 05:09:22,865 WARN L205 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-04-15 05:09:23,223 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 30 [2021-04-15 05:09:24,331 WARN L205 SmtUtils]: Spent 832.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 42 [2021-04-15 05:09:24,505 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-04-15 05:09:25,419 WARN L205 SmtUtils]: Spent 579.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-04-15 05:09:26,144 WARN L205 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 50 [2021-04-15 05:09:27,413 WARN L205 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2021-04-15 05:09:28,234 WARN L205 SmtUtils]: Spent 546.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 54 [2021-04-15 05:09:29,121 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-04-15 05:09:29,789 WARN L205 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-04-15 05:09:30,982 WARN L205 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2021-04-15 05:09:31,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:09:31,443 INFO L93 Difference]: Finished difference Result 2710 states and 8888 transitions. [2021-04-15 05:09:31,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 05:09:31,446 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:09:31,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:09:31,451 INFO L225 Difference]: With dead ends: 2710 [2021-04-15 05:09:31,451 INFO L226 Difference]: Without dead ends: 2680 [2021-04-15 05:09:31,451 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 11111.9ms TimeCoverageRelationStatistics Valid=235, Invalid=1097, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 05:09:31,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2680 states. [2021-04-15 05:09:31,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2680 to 1853. [2021-04-15 05:09:31,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1853 states, 1852 states have (on average 3.39902807775378) internal successors, (6295), 1852 states have internal predecessors, (6295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:09:31,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1853 states to 1853 states and 6295 transitions. [2021-04-15 05:09:31,483 INFO L78 Accepts]: Start accepts. Automaton has 1853 states and 6295 transitions. Word has length 26 [2021-04-15 05:09:31,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:09:31,483 INFO L480 AbstractCegarLoop]: Abstraction has 1853 states and 6295 transitions. [2021-04-15 05:09:31,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:09:31,483 INFO L276 IsEmpty]: Start isEmpty. Operand 1853 states and 6295 transitions. [2021-04-15 05:09:31,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:09:31,486 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:09:31,486 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:09:31,686 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2226 [2021-04-15 05:09:31,686 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:09:31,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:09:31,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1531090714, now seen corresponding path program 30 times [2021-04-15 05:09:31,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:09:31,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003636478] [2021-04-15 05:09:31,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:09:31,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:09:32,305 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2021-04-15 05:09:32,653 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2021-04-15 05:09:32,933 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-04-15 05:09:33,205 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-04-15 05:09:33,352 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:09:33,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003636478] [2021-04-15 05:09:33,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220835974] [2021-04-15 05:09:33,353 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:09:33,376 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 05:09:33,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:09:33,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:09:33,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:09:34,058 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-04-15 05:09:34,281 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-04-15 05:09:34,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:09:34,407 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:09:34,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:09:34,411 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:09:34,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:09:34,446 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:09:34,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:09:34,450 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:09:34,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:09:34,504 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:09:34,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-04-15 05:09:34,511 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:09:34,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:09:34,550 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:09:34,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:09:34,555 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:09:34,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:09:34,608 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:09:34,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-04-15 05:09:34,614 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:09:34,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:09:34,663 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:09:34,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-04-15 05:09:34,667 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:09:34,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:09:34,702 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:09:34,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:09:34,706 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:09:34,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:09:34,756 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:09:34,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-04-15 05:09:34,762 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:09:34,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:09:34,798 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:09:34,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-04-15 05:09:34,802 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:09:34,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:09:34,875 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:09:34,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-04-15 05:09:34,891 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:09:34,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:09:34,928 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:09:34,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-04-15 05:09:34,931 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:09:34,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:09:34,980 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:09:34,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-04-15 05:09:34,989 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:09:35,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:09:35,038 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:09:35,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-04-15 05:09:35,044 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:09:35,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:09:35,086 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:09:35,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-04-15 05:09:35,102 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:09:35,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:09:35,132 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:09:35,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-04-15 05:09:35,136 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:09:35,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:09:35,156 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:09:35,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-04-15 05:09:35,159 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-04-15 05:09:35,497 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-04-15 05:09:35,498 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:09:35,501 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-04-15 05:09:35,501 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-04-15 05:09:35,923 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-04-15 05:09:36,342 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 20 [2021-04-15 05:09:36,406 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:09:36,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:09:36,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-04-15 05:09:36,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234070060] [2021-04-15 05:09:36,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:09:36,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:09:36,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:09:36,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:09:36,408 INFO L87 Difference]: Start difference. First operand 1853 states and 6295 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:09:36,889 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 28 [2021-04-15 05:09:37,669 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2021-04-15 05:09:38,108 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2021-04-15 05:09:38,454 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 30 [2021-04-15 05:09:38,839 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-04-15 05:09:40,098 WARN L205 SmtUtils]: Spent 972.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 48 [2021-04-15 05:09:40,313 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-04-15 05:09:40,765 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 38 [2021-04-15 05:09:41,324 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 36 [2021-04-15 05:09:42,000 WARN L205 SmtUtils]: Spent 586.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2021-04-15 05:09:42,884 WARN L205 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 55 [2021-04-15 05:09:44,202 WARN L205 SmtUtils]: Spent 988.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-04-15 05:09:45,113 WARN L205 SmtUtils]: Spent 787.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 66 [2021-04-15 05:09:45,992 WARN L205 SmtUtils]: Spent 795.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 41 [2021-04-15 05:09:46,425 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-04-15 05:09:47,567 WARN L205 SmtUtils]: Spent 760.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-04-15 05:09:48,919 WARN L205 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 80 DAG size of output: 61 [2021-04-15 05:09:49,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:09:49,375 INFO L93 Difference]: Finished difference Result 2506 states and 8354 transitions. [2021-04-15 05:09:49,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 05:09:49,378 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:09:49,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:09:49,383 INFO L225 Difference]: With dead ends: 2506 [2021-04-15 05:09:49,383 INFO L226 Difference]: Without dead ends: 2491 [2021-04-15 05:09:49,383 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 13465.5ms TimeCoverageRelationStatistics Valid=268, Invalid=1292, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 05:09:49,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2491 states. [2021-04-15 05:09:49,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2491 to 1849. [2021-04-15 05:09:49,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1849 states, 1848 states have (on average 3.3955627705627704) internal successors, (6275), 1848 states have internal predecessors, (6275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:09:49,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1849 states to 1849 states and 6275 transitions. [2021-04-15 05:09:49,415 INFO L78 Accepts]: Start accepts. Automaton has 1849 states and 6275 transitions. Word has length 26 [2021-04-15 05:09:49,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:09:49,415 INFO L480 AbstractCegarLoop]: Abstraction has 1849 states and 6275 transitions. [2021-04-15 05:09:49,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:09:49,416 INFO L276 IsEmpty]: Start isEmpty. Operand 1849 states and 6275 transitions. [2021-04-15 05:09:49,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:09:49,419 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:09:49,420 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:09:49,642 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2243 [2021-04-15 05:09:49,642 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:09:49,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:09:49,643 INFO L82 PathProgramCache]: Analyzing trace with hash 663462910, now seen corresponding path program 31 times [2021-04-15 05:09:49,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:09:49,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737105300] [2021-04-15 05:09:49,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:09:49,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:09:50,128 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-04-15 05:09:50,336 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2021-04-15 05:09:50,606 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-04-15 05:09:50,818 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2021-04-15 05:09:50,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:09:50,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737105300] [2021-04-15 05:09:50,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950356911] [2021-04-15 05:09:50,937 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:09:50,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:09:50,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:09:50,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:09:51,576 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-04-15 05:09:51,867 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-04-15 05:09:52,141 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-04-15 05:09:52,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:09:52,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:09:52,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:09:52,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-04-15 05:09:52,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:09:52,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:09:52,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:09:52,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:09:52,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-04-15 05:09:52,635 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:09:52,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:09:52,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:09:52,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:09:52,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:09:52,663 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:09:52,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:09:52,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:09:52,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:09:52,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:09:52,692 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:09:52,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:09:52,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:09:52,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:09:52,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:09:52,723 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:09:52,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:09:52,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:09:52,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:09:52,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:09:52,751 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:09:52,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:09:52,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:09:52,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:09:52,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:09:52,781 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:09:52,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:09:52,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:09:52,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:09:52,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-04-15 05:09:52,812 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:09:52,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:09:52,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:09:52,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:09:52,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:09:52,853 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:09:52,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:09:52,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:09:52,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:09:52,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-04-15 05:09:52,884 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:09:52,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:09:52,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:09:52,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:09:52,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-04-15 05:09:52,917 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:09:52,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:09:52,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:09:52,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:09:52,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:09:52,951 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:09:52,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:09:52,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:09:52,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:09:52,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-04-15 05:09:52,972 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:09:52,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:09:52,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:09:52,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:09:52,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-04-15 05:09:53,003 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:09:53,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:09:53,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:09:53,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:09:53,020 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:09:53,384 WARN L205 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-04-15 05:09:53,386 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-04-15 05:09:53,390 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-04-15 05:09:53,390 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-04-15 05:09:53,573 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2021-04-15 05:09:53,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:09:53,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:09:53,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-04-15 05:09:53,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250800756] [2021-04-15 05:09:53,618 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:09:53,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:09:53,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:09:53,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:09:53,618 INFO L87 Difference]: Start difference. First operand 1849 states and 6275 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 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) [2021-04-15 05:09:53,842 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 25 [2021-04-15 05:09:54,584 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-04-15 05:09:55,126 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-04-15 05:09:55,462 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-04-15 05:09:55,853 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-04-15 05:09:55,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:09:55,902 INFO L93 Difference]: Finished difference Result 2303 states and 7667 transitions. [2021-04-15 05:09:55,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 05:09:55,905 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 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 26 [2021-04-15 05:09:55,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:09:55,909 INFO L225 Difference]: With dead ends: 2303 [2021-04-15 05:09:55,909 INFO L226 Difference]: Without dead ends: 2282 [2021-04-15 05:09:55,909 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 3685.9ms TimeCoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2021-04-15 05:09:55,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2282 states. [2021-04-15 05:09:55,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2282 to 1864. [2021-04-15 05:09:55,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1864 states, 1863 states have (on average 3.3988191089640365) internal successors, (6332), 1863 states have internal predecessors, (6332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:09:55,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1864 states to 1864 states and 6332 transitions. [2021-04-15 05:09:55,936 INFO L78 Accepts]: Start accepts. Automaton has 1864 states and 6332 transitions. Word has length 26 [2021-04-15 05:09:55,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:09:55,936 INFO L480 AbstractCegarLoop]: Abstraction has 1864 states and 6332 transitions. [2021-04-15 05:09:55,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 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) [2021-04-15 05:09:55,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1864 states and 6332 transitions. [2021-04-15 05:09:55,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:09:55,939 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:09:55,940 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:09:56,140 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2260 [2021-04-15 05:09:56,140 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:09:56,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:09:56,141 INFO L82 PathProgramCache]: Analyzing trace with hash 495653818, now seen corresponding path program 32 times [2021-04-15 05:09:56,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:09:56,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410013028] [2021-04-15 05:09:56,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:09:56,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:09:56,808 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-04-15 05:09:57,003 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 29 [2021-04-15 05:09:57,368 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-04-15 05:09:57,817 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-04-15 05:09:57,964 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 12 [2021-04-15 05:09:57,968 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:09:57,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410013028] [2021-04-15 05:09:57,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993223811] [2021-04-15 05:09:57,968 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:09:57,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:09:57,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:09:57,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-04-15 05:09:57,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:09:58,716 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-04-15 05:09:59,190 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-04-15 05:10:00,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:10:00,289 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2021-04-15 05:10:00,291 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-04-15 05:10:00,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-04-15 05:10:00,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:10:00,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:10:00,421 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:10:00,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-04-15 05:10:00,457 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:10:01,332 WARN L205 SmtUtils]: Spent 875.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-04-15 05:10:01,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:10:01,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:10:01,471 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-04-15 05:10:01,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-04-15 05:10:01,479 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:10:01,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:10:01,584 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-04-15 05:10:01,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-04-15 05:10:01,593 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:10:02,463 WARN L205 SmtUtils]: Spent 870.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-04-15 05:10:02,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:10:02,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:10:02,594 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-04-15 05:10:02,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-04-15 05:10:02,600 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:10:02,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:10:02,715 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-04-15 05:10:02,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-04-15 05:10:02,723 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:10:03,575 WARN L205 SmtUtils]: Spent 851.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-04-15 05:10:03,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:10:03,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:10:03,683 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:10:03,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-04-15 05:10:03,698 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:10:03,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:10:03,776 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:10:03,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-04-15 05:10:03,826 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:10:05,441 WARN L205 SmtUtils]: Spent 1.61 s on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2021-04-15 05:10:05,442 INFO L628 ElimStorePlain]: treesize reduction 17, result has 93.7 percent of original size [2021-04-15 05:10:05,505 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-04-15 05:10:05,505 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:357, output treesize:292 [2021-04-15 05:10:06,797 WARN L205 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-04-15 05:10:07,209 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2021-04-15 05:10:07,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:10:07,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:10:07,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-04-15 05:10:07,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036173559] [2021-04-15 05:10:07,298 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:10:07,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:10:07,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:10:07,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:10:07,299 INFO L87 Difference]: Start difference. First operand 1864 states and 6332 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:10:07,564 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2021-04-15 05:10:07,899 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-04-15 05:10:08,363 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 40 [2021-04-15 05:10:08,829 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2021-04-15 05:10:10,342 WARN L205 SmtUtils]: Spent 1.42 s on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2021-04-15 05:10:10,993 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 41 [2021-04-15 05:10:12,174 WARN L205 SmtUtils]: Spent 815.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2021-04-15 05:10:12,969 WARN L205 SmtUtils]: Spent 592.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-04-15 05:10:13,931 WARN L205 SmtUtils]: Spent 807.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2021-04-15 05:10:15,486 WARN L205 SmtUtils]: Spent 835.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 37 [2021-04-15 05:10:15,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:10:15,712 INFO L93 Difference]: Finished difference Result 2295 states and 7632 transitions. [2021-04-15 05:10:15,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 05:10:15,716 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:10:15,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:10:15,721 INFO L225 Difference]: With dead ends: 2295 [2021-04-15 05:10:15,721 INFO L226 Difference]: Without dead ends: 2266 [2021-04-15 05:10:15,721 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 11087.8ms TimeCoverageRelationStatistics Valid=153, Invalid=659, Unknown=0, NotChecked=0, Total=812 [2021-04-15 05:10:15,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2266 states. [2021-04-15 05:10:15,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2266 to 1849. [2021-04-15 05:10:15,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1849 states, 1848 states have (on average 3.3955627705627704) internal successors, (6275), 1848 states have internal predecessors, (6275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:10:15,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1849 states to 1849 states and 6275 transitions. [2021-04-15 05:10:15,747 INFO L78 Accepts]: Start accepts. Automaton has 1849 states and 6275 transitions. Word has length 26 [2021-04-15 05:10:15,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:10:15,747 INFO L480 AbstractCegarLoop]: Abstraction has 1849 states and 6275 transitions. [2021-04-15 05:10:15,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:10:15,747 INFO L276 IsEmpty]: Start isEmpty. Operand 1849 states and 6275 transitions. [2021-04-15 05:10:15,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:10:15,749 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:10:15,749 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:10:15,950 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2294,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:10:15,950 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:10:15,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:10:15,951 INFO L82 PathProgramCache]: Analyzing trace with hash 794427266, now seen corresponding path program 33 times [2021-04-15 05:10:15,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:10:15,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144655732] [2021-04-15 05:10:15,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:10:15,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:10:16,602 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2021-04-15 05:10:16,844 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-04-15 05:10:17,051 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 19 [2021-04-15 05:10:17,247 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2021-04-15 05:10:17,397 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 12 [2021-04-15 05:10:17,401 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:10:17,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144655732] [2021-04-15 05:10:17,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335256965] [2021-04-15 05:10:17,402 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:10:17,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 05:10:17,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:10:17,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-04-15 05:10:17,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:10:18,175 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-04-15 05:10:18,563 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-04-15 05:10:19,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:10:19,500 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-04-15 05:10:19,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-04-15 05:10:19,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:10:19,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:10:19,628 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-04-15 05:10:19,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-04-15 05:10:19,647 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:10:20,382 WARN L205 SmtUtils]: Spent 735.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-04-15 05:10:20,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:10:20,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:10:20,478 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:10:20,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-04-15 05:10:20,504 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:10:20,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:10:20,593 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-04-15 05:10:20,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-04-15 05:10:20,601 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:10:21,337 WARN L205 SmtUtils]: Spent 735.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-04-15 05:10:21,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:10:21,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:10:21,427 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:10:21,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-04-15 05:10:21,459 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:10:21,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:10:21,570 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-04-15 05:10:21,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-04-15 05:10:21,576 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:10:22,956 WARN L205 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2021-04-15 05:10:22,957 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.8 percent of original size [2021-04-15 05:10:22,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:10:23,043 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:10:23,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-04-15 05:10:23,059 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:10:23,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:10:23,156 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-04-15 05:10:23,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-04-15 05:10:23,161 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:10:24,399 WARN L205 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-04-15 05:10:24,401 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.5 percent of original size [2021-04-15 05:10:24,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-04-15 05:10:24,453 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:349, output treesize:259 [2021-04-15 05:10:25,561 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-04-15 05:10:25,972 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 20 [2021-04-15 05:10:26,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:10:26,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:10:26,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-04-15 05:10:26,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362076935] [2021-04-15 05:10:26,056 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:10:26,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:10:26,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:10:26,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:10:26,057 INFO L87 Difference]: Start difference. First operand 1849 states and 6275 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:10:26,687 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 33 [2021-04-15 05:10:27,137 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-04-15 05:10:27,679 WARN L205 SmtUtils]: Spent 472.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-04-15 05:10:28,139 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2021-04-15 05:10:28,745 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-04-15 05:10:29,541 WARN L205 SmtUtils]: Spent 710.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-04-15 05:10:30,456 WARN L205 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 30 [2021-04-15 05:10:30,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:10:30,708 INFO L93 Difference]: Finished difference Result 2056 states and 6874 transitions. [2021-04-15 05:10:30,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 05:10:30,712 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:10:30,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:10:30,717 INFO L225 Difference]: With dead ends: 2056 [2021-04-15 05:10:30,717 INFO L226 Difference]: Without dead ends: 2031 [2021-04-15 05:10:30,717 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 6975.6ms TimeCoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2021-04-15 05:10:30,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2031 states. [2021-04-15 05:10:30,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2031 to 1831. [2021-04-15 05:10:30,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1831 states, 1830 states have (on average 3.3994535519125684) internal successors, (6221), 1830 states have internal predecessors, (6221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:10:30,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1831 states to 1831 states and 6221 transitions. [2021-04-15 05:10:30,752 INFO L78 Accepts]: Start accepts. Automaton has 1831 states and 6221 transitions. Word has length 26 [2021-04-15 05:10:30,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:10:30,752 INFO L480 AbstractCegarLoop]: Abstraction has 1831 states and 6221 transitions. [2021-04-15 05:10:30,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:10:30,752 INFO L276 IsEmpty]: Start isEmpty. Operand 1831 states and 6221 transitions. [2021-04-15 05:10:30,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:10:30,755 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:10:30,755 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:10:30,955 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2339,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:10:30,955 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:10:30,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:10:30,956 INFO L82 PathProgramCache]: Analyzing trace with hash 939333122, now seen corresponding path program 34 times [2021-04-15 05:10:30,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:10:30,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902911503] [2021-04-15 05:10:30,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:10:30,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:10:31,767 WARN L205 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2021-04-15 05:10:32,080 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-04-15 05:10:32,266 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-04-15 05:10:32,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:10:32,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902911503] [2021-04-15 05:10:32,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329419325] [2021-04-15 05:10:32,490 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:10:32,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:10:32,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:10:32,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-04-15 05:10:32,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:10:33,253 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-04-15 05:10:34,329 WARN L205 SmtUtils]: Spent 663.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2021-04-15 05:10:34,880 INFO L446 ElimStorePlain]: Different costs {2=[A, v_prenex_261], 3=[v_prenex_260, v_prenex_262]} [2021-04-15 05:10:34,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:10:34,950 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:10:34,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-04-15 05:10:34,956 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:10:34,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:10:35,008 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:10:35,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-04-15 05:10:35,020 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:10:35,746 WARN L205 SmtUtils]: Spent 725.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-04-15 05:10:35,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:10:35,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:10:35,813 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:10:35,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-04-15 05:10:35,820 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:10:35,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:10:35,859 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:10:35,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-04-15 05:10:35,865 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:10:36,546 WARN L205 SmtUtils]: Spent 681.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-04-15 05:10:36,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:10:36,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:10:36,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:10:36,624 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-04-15 05:10:36,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 19 [2021-04-15 05:10:36,633 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:10:36,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:10:36,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:10:36,687 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:10:36,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-04-15 05:10:36,713 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:10:37,428 WARN L205 SmtUtils]: Spent 714.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-04-15 05:10:37,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:10:37,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:10:37,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:10:37,500 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-04-15 05:10:37,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 22 [2021-04-15 05:10:37,508 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:10:37,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:10:37,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:10:37,555 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:10:37,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-04-15 05:10:37,577 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:10:38,176 WARN L205 SmtUtils]: Spent 598.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-04-15 05:10:38,177 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:10:38,195 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-04-15 05:10:38,195 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:357, output treesize:194 [2021-04-15 05:10:38,716 WARN L205 SmtUtils]: Spent 421.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-04-15 05:10:39,179 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 22 [2021-04-15 05:10:39,291 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:10:39,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:10:39,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-04-15 05:10:39,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431289079] [2021-04-15 05:10:39,292 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:10:39,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:10:39,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:10:39,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:10:39,292 INFO L87 Difference]: Start difference. First operand 1831 states and 6221 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:10:39,521 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-04-15 05:10:40,653 WARN L205 SmtUtils]: Spent 935.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 45 [2021-04-15 05:10:41,841 WARN L205 SmtUtils]: Spent 629.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 33 [2021-04-15 05:10:42,485 WARN L205 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 39 [2021-04-15 05:10:42,972 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-04-15 05:10:43,629 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-04-15 05:10:44,218 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-04-15 05:10:45,401 WARN L205 SmtUtils]: Spent 539.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-04-15 05:10:45,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:10:45,683 INFO L93 Difference]: Finished difference Result 2461 states and 8160 transitions. [2021-04-15 05:10:45,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 05:10:45,688 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:10:45,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:10:45,693 INFO L225 Difference]: With dead ends: 2461 [2021-04-15 05:10:45,693 INFO L226 Difference]: Without dead ends: 2436 [2021-04-15 05:10:45,693 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 8408.6ms TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2021-04-15 05:10:45,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2436 states. [2021-04-15 05:10:45,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2436 to 1819. [2021-04-15 05:10:45,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1819 states, 1818 states have (on average 3.3987898789878987) internal successors, (6179), 1818 states have internal predecessors, (6179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:10:45,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1819 states to 1819 states and 6179 transitions. [2021-04-15 05:10:45,720 INFO L78 Accepts]: Start accepts. Automaton has 1819 states and 6179 transitions. Word has length 26 [2021-04-15 05:10:45,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:10:45,720 INFO L480 AbstractCegarLoop]: Abstraction has 1819 states and 6179 transitions. [2021-04-15 05:10:45,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:10:45,721 INFO L276 IsEmpty]: Start isEmpty. Operand 1819 states and 6179 transitions. [2021-04-15 05:10:45,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:10:45,723 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:10:45,724 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:10:45,945 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2395,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:10:45,946 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:10:45,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:10:45,946 INFO L82 PathProgramCache]: Analyzing trace with hash 305289786, now seen corresponding path program 35 times [2021-04-15 05:10:45,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:10:45,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941212817] [2021-04-15 05:10:45,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:10:45,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:10:46,103 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 17 [2021-04-15 05:10:46,344 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2021-04-15 05:10:46,553 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-04-15 05:10:46,858 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2021-04-15 05:10:47,203 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2021-04-15 05:10:47,526 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2021-04-15 05:10:47,725 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 12 [2021-04-15 05:10:47,729 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:10:47,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941212817] [2021-04-15 05:10:47,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151220778] [2021-04-15 05:10:47,729 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:10:47,752 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 05:10:47,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:10:47,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:10:47,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:10:48,306 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-04-15 05:10:48,633 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-04-15 05:10:48,926 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-04-15 05:10:49,385 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-04-15 05:10:49,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:10:49,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:10:49,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:10:49,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:10:49,944 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:10:49,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:10:49,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:10:49,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:10:49,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:10:49,973 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:10:49,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:10:49,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:10:49,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:10:49,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:10:50,002 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:10:50,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:10:50,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:10:50,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:10:50,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-04-15 05:10:50,031 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:10:50,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:10:50,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:10:50,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:10:50,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-04-15 05:10:50,060 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:10:50,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:10:50,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:10:50,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:10:50,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:10:50,090 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:10:50,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:10:50,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:10:50,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:10:50,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-04-15 05:10:50,127 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:10:50,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:10:50,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:10:50,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:10:50,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-04-15 05:10:50,163 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:10:50,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:10:50,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:10:50,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:10:50,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-04-15 05:10:50,197 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:10:50,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:10:50,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:10:50,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:10:50,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:10:50,226 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:10:50,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:10:50,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:10:50,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:10:50,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-04-15 05:10:50,255 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:10:50,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:10:50,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:10:50,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:10:50,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:10:50,284 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:10:50,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:10:50,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:10:50,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:10:50,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-04-15 05:10:50,313 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:10:50,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:10:50,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:10:50,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:10:50,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:10:50,335 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:10:50,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:10:50,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:10:50,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:10:50,355 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:10:50,803 WARN L205 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-04-15 05:10:50,805 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-04-15 05:10:50,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-04-15 05:10:50,810 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-04-15 05:10:51,048 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2021-04-15 05:10:51,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:10:51,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:10:51,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-04-15 05:10:51,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79441987] [2021-04-15 05:10:51,108 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 05:10:51,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:10:51,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 05:10:51,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:10:51,108 INFO L87 Difference]: Start difference. First operand 1819 states and 6179 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:10:51,429 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 25 [2021-04-15 05:10:52,023 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-04-15 05:10:52,882 WARN L205 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 39 [2021-04-15 05:10:53,390 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2021-04-15 05:10:54,522 WARN L205 SmtUtils]: Spent 769.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2021-04-15 05:10:55,489 WARN L205 SmtUtils]: Spent 752.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2021-04-15 05:10:56,058 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-04-15 05:10:56,491 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-04-15 05:10:56,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:10:56,662 INFO L93 Difference]: Finished difference Result 2320 states and 7724 transitions. [2021-04-15 05:10:56,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 05:10:56,667 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:10:56,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:10:56,672 INFO L225 Difference]: With dead ends: 2320 [2021-04-15 05:10:56,672 INFO L226 Difference]: Without dead ends: 2305 [2021-04-15 05:10:56,672 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 7176.0ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-04-15 05:10:56,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2305 states. [2021-04-15 05:10:56,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2305 to 1855. [2021-04-15 05:10:56,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1855 states, 1854 states have (on average 3.3910463861920173) internal successors, (6287), 1854 states have internal predecessors, (6287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:10:56,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1855 states to 1855 states and 6287 transitions. [2021-04-15 05:10:56,703 INFO L78 Accepts]: Start accepts. Automaton has 1855 states and 6287 transitions. Word has length 26 [2021-04-15 05:10:56,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:10:56,703 INFO L480 AbstractCegarLoop]: Abstraction has 1855 states and 6287 transitions. [2021-04-15 05:10:56,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:10:56,704 INFO L276 IsEmpty]: Start isEmpty. Operand 1855 states and 6287 transitions. [2021-04-15 05:10:56,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:10:56,707 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:10:56,707 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:10:56,919 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2427,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:10:56,919 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:10:56,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:10:56,919 INFO L82 PathProgramCache]: Analyzing trace with hash 137480694, now seen corresponding path program 36 times [2021-04-15 05:10:56,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:10:56,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058595334] [2021-04-15 05:10:56,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:10:56,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:10:57,522 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-04-15 05:10:57,782 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-04-15 05:10:57,975 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-04-15 05:10:58,142 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 16 [2021-04-15 05:10:58,296 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 12 [2021-04-15 05:10:58,299 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:10:58,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058595334] [2021-04-15 05:10:58,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598309487] [2021-04-15 05:10:58,300 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:10:58,321 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 05:10:58,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:10:58,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-04-15 05:10:58,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:10:58,795 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-04-15 05:10:58,977 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-04-15 05:10:59,246 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-04-15 05:10:59,776 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-04-15 05:10:59,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-04-15 05:10:59,784 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:10:59,896 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-04-15 05:10:59,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-04-15 05:10:59,902 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:10:59,940 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-04-15 05:10:59,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:10:59,944 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:10:59,979 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-04-15 05:10:59,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:10:59,982 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:00,019 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-04-15 05:11:00,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-04-15 05:11:00,022 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:00,086 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:11:00,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-04-15 05:11:00,090 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:00,154 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:11:00,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-04-15 05:11:00,166 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:00,263 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:11:00,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-04-15 05:11:00,291 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:00,416 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-04-15 05:11:00,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-04-15 05:11:00,436 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:00,488 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-04-15 05:11:00,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-04-15 05:11:00,493 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:00,544 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-04-15 05:11:00,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 22 [2021-04-15 05:11:00,548 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:00,594 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-04-15 05:11:00,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:11:00,598 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:00,647 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-04-15 05:11:00,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 16 [2021-04-15 05:11:00,651 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:00,754 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-04-15 05:11:00,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-04-15 05:11:00,761 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:00,810 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-04-15 05:11:00,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:11:00,815 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:00,911 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-04-15 05:11:00,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-04-15 05:11:00,932 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:01,571 WARN L205 SmtUtils]: Spent 638.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-04-15 05:11:01,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:11:01,608 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-04-15 05:11:01,608 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:769, output treesize:376 [2021-04-15 05:11:03,529 WARN L205 SmtUtils]: Spent 1.83 s on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-04-15 05:11:04,668 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-04-15 05:11:05,175 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 20 [2021-04-15 05:11:05,217 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:05,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:11:05,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-04-15 05:11:05,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132949314] [2021-04-15 05:11:05,218 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:11:05,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:11:05,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:11:05,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:11:05,218 INFO L87 Difference]: Start difference. First operand 1855 states and 6287 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:05,555 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 25 [2021-04-15 05:11:06,032 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2021-04-15 05:11:06,384 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2021-04-15 05:11:08,099 WARN L205 SmtUtils]: Spent 1.57 s on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2021-04-15 05:11:08,824 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-04-15 05:11:09,376 WARN L205 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2021-04-15 05:11:10,407 WARN L205 SmtUtils]: Spent 699.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2021-04-15 05:11:10,671 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-04-15 05:11:11,493 WARN L205 SmtUtils]: Spent 698.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-04-15 05:11:13,338 WARN L205 SmtUtils]: Spent 1.47 s on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-04-15 05:11:15,035 WARN L205 SmtUtils]: Spent 1.48 s on a formula simplification. DAG size of input: 68 DAG size of output: 33 [2021-04-15 05:11:15,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:11:15,411 INFO L93 Difference]: Finished difference Result 2577 states and 8546 transitions. [2021-04-15 05:11:15,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 05:11:15,415 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:11:15,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:11:15,420 INFO L225 Difference]: With dead ends: 2577 [2021-04-15 05:11:15,420 INFO L226 Difference]: Without dead ends: 2562 [2021-04-15 05:11:15,420 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 13881.5ms TimeCoverageRelationStatistics Valid=201, Invalid=791, Unknown=0, NotChecked=0, Total=992 [2021-04-15 05:11:15,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2562 states. [2021-04-15 05:11:15,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2562 to 1865. [2021-04-15 05:11:15,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1865 states, 1864 states have (on average 3.3953862660944205) internal successors, (6329), 1864 states have internal predecessors, (6329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:15,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1865 states to 1865 states and 6329 transitions. [2021-04-15 05:11:15,448 INFO L78 Accepts]: Start accepts. Automaton has 1865 states and 6329 transitions. Word has length 26 [2021-04-15 05:11:15,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:11:15,448 INFO L480 AbstractCegarLoop]: Abstraction has 1865 states and 6329 transitions. [2021-04-15 05:11:15,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:15,448 INFO L276 IsEmpty]: Start isEmpty. Operand 1865 states and 6329 transitions. [2021-04-15 05:11:15,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:11:15,451 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:11:15,451 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:11:15,651 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2461 [2021-04-15 05:11:15,651 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:11:15,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:11:15,652 INFO L82 PathProgramCache]: Analyzing trace with hash 436254142, now seen corresponding path program 37 times [2021-04-15 05:11:15,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:11:15,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639146519] [2021-04-15 05:11:15,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:11:15,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:11:16,203 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-04-15 05:11:16,448 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 23 [2021-04-15 05:11:16,667 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 18 [2021-04-15 05:11:16,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:16,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639146519] [2021-04-15 05:11:16,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249236058] [2021-04-15 05:11:16,833 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:11:16,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:11:16,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:11:16,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:11:17,461 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-04-15 05:11:17,673 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-04-15 05:11:18,075 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-04-15 05:11:18,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:18,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:18,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:18,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:11:18,289 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:18,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:18,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:18,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:11:18,308 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:18,986 WARN L205 SmtUtils]: Spent 677.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 45 [2021-04-15 05:11:18,987 INFO L628 ElimStorePlain]: treesize reduction 100, result has 55.6 percent of original size [2021-04-15 05:11:18,987 INFO L518 ElimStorePlain]: Eliminatee v_prenex_263 vanished before elimination [2021-04-15 05:11:18,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:19,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:19,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-04-15 05:11:19,009 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:19,303 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-04-15 05:11:19,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:11:19,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:19,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:19,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:19,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:11:19,334 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:19,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:19,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:19,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:11:19,355 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:19,586 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-04-15 05:11:19,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:11:19,596 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-04-15 05:11:19,596 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:264, output treesize:51 [2021-04-15 05:11:19,823 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2021-04-15 05:11:19,930 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:19,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:11:19,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-04-15 05:11:19,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564220187] [2021-04-15 05:11:19,931 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:11:19,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:11:19,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:11:19,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:11:19,931 INFO L87 Difference]: Start difference. First operand 1865 states and 6329 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:20,515 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-04-15 05:11:21,274 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2021-04-15 05:11:21,556 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-04-15 05:11:21,895 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-04-15 05:11:22,446 WARN L205 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 43 [2021-04-15 05:11:22,815 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 33 [2021-04-15 05:11:24,140 WARN L205 SmtUtils]: Spent 678.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-04-15 05:11:24,679 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-04-15 05:11:24,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:11:24,879 INFO L93 Difference]: Finished difference Result 2506 states and 8276 transitions. [2021-04-15 05:11:24,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 05:11:24,884 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:11:24,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:11:24,888 INFO L225 Difference]: With dead ends: 2506 [2021-04-15 05:11:24,888 INFO L226 Difference]: Without dead ends: 2476 [2021-04-15 05:11:24,889 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 5662.8ms TimeCoverageRelationStatistics Valid=208, Invalid=722, Unknown=0, NotChecked=0, Total=930 [2021-04-15 05:11:24,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2476 states. [2021-04-15 05:11:24,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2476 to 1867. [2021-04-15 05:11:24,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1867 states, 1866 states have (on average 3.397106109324759) internal successors, (6339), 1866 states have internal predecessors, (6339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:24,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1867 states to 1867 states and 6339 transitions. [2021-04-15 05:11:24,915 INFO L78 Accepts]: Start accepts. Automaton has 1867 states and 6339 transitions. Word has length 26 [2021-04-15 05:11:24,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:11:24,915 INFO L480 AbstractCegarLoop]: Abstraction has 1867 states and 6339 transitions. [2021-04-15 05:11:24,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:24,915 INFO L276 IsEmpty]: Start isEmpty. Operand 1867 states and 6339 transitions. [2021-04-15 05:11:24,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:11:24,917 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:11:24,918 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:11:25,118 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2513,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:11:25,118 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:11:25,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:11:25,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1514157122, now seen corresponding path program 38 times [2021-04-15 05:11:25,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:11:25,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361596307] [2021-04-15 05:11:25,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:11:25,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:11:25,407 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2021-04-15 05:11:25,547 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2021-04-15 05:11:25,797 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-04-15 05:11:26,275 WARN L205 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-04-15 05:11:26,662 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2021-04-15 05:11:26,815 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 16 [2021-04-15 05:11:26,959 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 12 [2021-04-15 05:11:26,962 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:26,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361596307] [2021-04-15 05:11:26,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545483828] [2021-04-15 05:11:26,963 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:11:26,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:11:26,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:11:26,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-04-15 05:11:26,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:11:27,937 WARN L205 SmtUtils]: Spent 543.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-04-15 05:11:28,368 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-04-15 05:11:29,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:29,397 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:11:29,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-04-15 05:11:29,428 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:29,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:29,538 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-04-15 05:11:29,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-04-15 05:11:29,546 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:31,098 WARN L205 SmtUtils]: Spent 1.55 s on a formula simplification. DAG size of input: 79 DAG size of output: 78 [2021-04-15 05:11:31,100 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.4 percent of original size [2021-04-15 05:11:31,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:31,240 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-04-15 05:11:31,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-04-15 05:11:31,246 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:31,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:31,323 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:11:31,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-04-15 05:11:31,341 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:32,903 WARN L205 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2021-04-15 05:11:32,905 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.1 percent of original size [2021-04-15 05:11:32,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:33,016 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-04-15 05:11:33,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-04-15 05:11:33,024 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:33,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:33,095 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:11:33,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-04-15 05:11:33,121 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:33,840 WARN L205 SmtUtils]: Spent 717.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-04-15 05:11:33,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:11:33,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:33,976 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-04-15 05:11:33,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-04-15 05:11:33,985 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:34,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:34,093 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-04-15 05:11:34,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-04-15 05:11:34,113 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:34,835 WARN L205 SmtUtils]: Spent 721.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-04-15 05:11:34,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:11:34,905 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-04-15 05:11:34,905 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:365, output treesize:253 [2021-04-15 05:11:36,178 WARN L205 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-04-15 05:11:36,644 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 22 [2021-04-15 05:11:36,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:36,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:11:36,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-04-15 05:11:36,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382983065] [2021-04-15 05:11:36,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:11:36,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:11:36,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:11:36,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:11:36,738 INFO L87 Difference]: Start difference. First operand 1867 states and 6339 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:38,183 WARN L205 SmtUtils]: Spent 652.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 32 [2021-04-15 05:11:39,758 WARN L205 SmtUtils]: Spent 1.48 s on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2021-04-15 05:11:40,271 WARN L205 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-04-15 05:11:40,743 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-04-15 05:11:41,400 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-04-15 05:11:42,336 WARN L205 SmtUtils]: Spent 572.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-04-15 05:11:42,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:11:42,463 INFO L93 Difference]: Finished difference Result 2436 states and 8120 transitions. [2021-04-15 05:11:42,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 05:11:42,468 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:11:42,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:11:42,473 INFO L225 Difference]: With dead ends: 2436 [2021-04-15 05:11:42,473 INFO L226 Difference]: Without dead ends: 2421 [2021-04-15 05:11:42,473 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 8997.4ms TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2021-04-15 05:11:42,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2421 states. [2021-04-15 05:11:42,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2421 to 1885. [2021-04-15 05:11:42,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1885 states, 1884 states have (on average 3.393312101910828) internal successors, (6393), 1884 states have internal predecessors, (6393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:42,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 6393 transitions. [2021-04-15 05:11:42,500 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 6393 transitions. Word has length 26 [2021-04-15 05:11:42,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:11:42,500 INFO L480 AbstractCegarLoop]: Abstraction has 1885 states and 6393 transitions. [2021-04-15 05:11:42,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:42,500 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 6393 transitions. [2021-04-15 05:11:42,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:11:42,503 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:11:42,503 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:11:42,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2524 [2021-04-15 05:11:42,705 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:11:42,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:11:42,705 INFO L82 PathProgramCache]: Analyzing trace with hash -714815838, now seen corresponding path program 39 times [2021-04-15 05:11:42,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:11:42,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624959271] [2021-04-15 05:11:42,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:11:42,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:11:42,876 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 17 [2021-04-15 05:11:43,421 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-04-15 05:11:43,660 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-04-15 05:11:44,013 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-04-15 05:11:44,346 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-04-15 05:11:44,529 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 12 [2021-04-15 05:11:44,534 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:44,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624959271] [2021-04-15 05:11:44,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195753333] [2021-04-15 05:11:44,534 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:11:44,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 05:11:44,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:11:44,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:11:44,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:11:45,021 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-04-15 05:11:45,482 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-04-15 05:11:46,631 WARN L205 SmtUtils]: Spent 773.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-04-15 05:11:48,077 WARN L205 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 92 DAG size of output: 56 [2021-04-15 05:11:48,467 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_285], 2=[A, v_prenex_284]} [2021-04-15 05:11:48,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:48,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-04-15 05:11:48,490 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:49,181 WARN L205 SmtUtils]: Spent 691.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-04-15 05:11:49,183 INFO L628 ElimStorePlain]: treesize reduction 54, result has 69.8 percent of original size [2021-04-15 05:11:49,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:49,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:49,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:11:49,203 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:49,408 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-04-15 05:11:49,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:11:49,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:49,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:49,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:49,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:11:49,440 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:49,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:11:49,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:11:49,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-04-15 05:11:49,465 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:11:49,745 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-04-15 05:11:49,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:11:49,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-04-15 05:11:49,756 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:193, output treesize:51 [2021-04-15 05:11:50,028 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2021-04-15 05:11:50,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:11:50,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:11:50,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-04-15 05:11:50,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448504488] [2021-04-15 05:11:50,131 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:11:50,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:11:50,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:11:50,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:11:50,131 INFO L87 Difference]: Start difference. First operand 1885 states and 6393 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:50,415 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 25 [2021-04-15 05:11:50,568 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-04-15 05:11:50,787 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-04-15 05:11:51,630 WARN L205 SmtUtils]: Spent 694.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2021-04-15 05:11:52,389 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-04-15 05:11:52,614 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-04-15 05:11:53,052 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2021-04-15 05:11:53,691 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-04-15 05:11:54,991 WARN L205 SmtUtils]: Spent 843.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-04-15 05:11:56,683 WARN L205 SmtUtils]: Spent 1.47 s on a formula simplification. DAG size of input: 101 DAG size of output: 77 [2021-04-15 05:11:57,603 WARN L205 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2021-04-15 05:11:58,129 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-04-15 05:11:58,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:11:58,235 INFO L93 Difference]: Finished difference Result 2516 states and 8289 transitions. [2021-04-15 05:11:58,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 05:11:58,240 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:11:58,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:11:58,245 INFO L225 Difference]: With dead ends: 2516 [2021-04-15 05:11:58,245 INFO L226 Difference]: Without dead ends: 2471 [2021-04-15 05:11:58,245 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 10967.8ms TimeCoverageRelationStatistics Valid=173, Invalid=697, Unknown=0, NotChecked=0, Total=870 [2021-04-15 05:11:58,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2471 states. [2021-04-15 05:11:58,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2471 to 1925. [2021-04-15 05:11:58,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1925 states, 1924 states have (on average 3.396049896049896) internal successors, (6534), 1924 states have internal predecessors, (6534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:58,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1925 states to 1925 states and 6534 transitions. [2021-04-15 05:11:58,273 INFO L78 Accepts]: Start accepts. Automaton has 1925 states and 6534 transitions. Word has length 26 [2021-04-15 05:11:58,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:11:58,273 INFO L480 AbstractCegarLoop]: Abstraction has 1925 states and 6534 transitions. [2021-04-15 05:11:58,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:11:58,273 INFO L276 IsEmpty]: Start isEmpty. Operand 1925 states and 6534 transitions. [2021-04-15 05:11:58,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:11:58,275 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:11:58,275 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:11:58,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2582,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:11:58,476 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:11:58,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:11:58,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1962618678, now seen corresponding path program 40 times [2021-04-15 05:11:58,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:11:58,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401998808] [2021-04-15 05:11:58,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:11:58,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:11:59,160 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-04-15 05:11:59,366 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-04-15 05:11:59,721 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-04-15 05:11:59,922 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 16 [2021-04-15 05:12:00,100 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 12 [2021-04-15 05:12:00,104 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:12:00,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401998808] [2021-04-15 05:12:00,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019266317] [2021-04-15 05:12:00,105 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:12:00,126 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:12:00,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:12:00,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-04-15 05:12:00,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:12:00,517 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-04-15 05:12:01,005 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-04-15 05:12:02,142 WARN L205 SmtUtils]: Spent 725.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-04-15 05:12:02,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:02,411 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:12:02,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-04-15 05:12:02,430 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:03,025 WARN L205 SmtUtils]: Spent 594.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-04-15 05:12:03,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:12:03,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:03,076 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:12:03,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-04-15 05:12:03,099 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:03,753 WARN L205 SmtUtils]: Spent 652.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-04-15 05:12:03,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:12:03,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:03,813 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:12:03,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-04-15 05:12:03,822 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:04,452 WARN L205 SmtUtils]: Spent 629.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-04-15 05:12:04,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:12:04,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:04,503 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:12:04,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-04-15 05:12:04,511 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:05,120 WARN L205 SmtUtils]: Spent 608.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-04-15 05:12:05,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:12:05,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:05,175 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:12:05,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-04-15 05:12:05,188 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:05,830 WARN L205 SmtUtils]: Spent 642.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-04-15 05:12:05,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:12:05,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:05,888 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:12:05,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-04-15 05:12:05,898 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:06,507 WARN L205 SmtUtils]: Spent 608.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-04-15 05:12:06,509 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:12:06,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:06,567 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:12:06,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-04-15 05:12:06,577 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:07,176 WARN L205 SmtUtils]: Spent 598.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-04-15 05:12:07,177 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:12:07,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:07,227 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:12:07,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-04-15 05:12:07,234 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:07,828 WARN L205 SmtUtils]: Spent 593.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-04-15 05:12:07,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:12:07,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-04-15 05:12:07,851 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:325, output treesize:174 [2021-04-15 05:12:08,468 WARN L205 SmtUtils]: Spent 491.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-04-15 05:12:08,983 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 20 [2021-04-15 05:12:09,108 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:12:09,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:12:09,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-04-15 05:12:09,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244413519] [2021-04-15 05:12:09,109 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:12:09,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:12:09,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:12:09,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:12:09,110 INFO L87 Difference]: Start difference. First operand 1925 states and 6534 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:12:09,441 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 25 [2021-04-15 05:12:09,592 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-04-15 05:12:09,865 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-04-15 05:12:10,998 WARN L205 SmtUtils]: Spent 955.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2021-04-15 05:12:11,379 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2021-04-15 05:12:12,133 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-04-15 05:12:12,846 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-04-15 05:12:14,065 WARN L205 SmtUtils]: Spent 812.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-04-15 05:12:16,199 WARN L205 SmtUtils]: Spent 1.87 s on a formula simplification. DAG size of input: 83 DAG size of output: 77 [2021-04-15 05:12:17,723 WARN L205 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2021-04-15 05:12:19,004 WARN L205 SmtUtils]: Spent 816.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 43 [2021-04-15 05:12:19,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:12:19,709 INFO L93 Difference]: Finished difference Result 2715 states and 8950 transitions. [2021-04-15 05:12:19,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 05:12:19,713 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:12:19,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:12:19,717 INFO L225 Difference]: With dead ends: 2715 [2021-04-15 05:12:19,717 INFO L226 Difference]: Without dead ends: 2685 [2021-04-15 05:12:19,718 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 12270.8ms TimeCoverageRelationStatistics Valid=199, Invalid=671, Unknown=0, NotChecked=0, Total=870 [2021-04-15 05:12:19,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2685 states. [2021-04-15 05:12:19,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2685 to 1914. [2021-04-15 05:12:19,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1914 states, 1913 states have (on average 3.3946680606377417) internal successors, (6494), 1913 states have internal predecessors, (6494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:12:19,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1914 states to 1914 states and 6494 transitions. [2021-04-15 05:12:19,747 INFO L78 Accepts]: Start accepts. Automaton has 1914 states and 6494 transitions. Word has length 26 [2021-04-15 05:12:19,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:12:19,747 INFO L480 AbstractCegarLoop]: Abstraction has 1914 states and 6494 transitions. [2021-04-15 05:12:19,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:12:19,747 INFO L276 IsEmpty]: Start isEmpty. Operand 1914 states and 6494 transitions. [2021-04-15 05:12:19,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:12:19,750 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:12:19,750 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:12:19,950 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2593,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:12:19,950 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:12:19,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:12:19,951 INFO L82 PathProgramCache]: Analyzing trace with hash 272675774, now seen corresponding path program 41 times [2021-04-15 05:12:19,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:12:19,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235322038] [2021-04-15 05:12:19,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:12:19,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:12:20,801 WARN L205 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-04-15 05:12:21,230 WARN L205 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-04-15 05:12:21,442 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2021-04-15 05:12:21,731 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 16 [2021-04-15 05:12:21,985 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 12 [2021-04-15 05:12:21,989 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:12:21,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235322038] [2021-04-15 05:12:21,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852184993] [2021-04-15 05:12:21,990 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:12:22,012 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 05:12:22,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:12:22,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:12:22,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:12:22,633 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-04-15 05:12:23,112 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-04-15 05:12:24,166 WARN L205 SmtUtils]: Spent 653.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-04-15 05:12:24,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:24,831 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:12:24,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-04-15 05:12:24,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:24,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:24,918 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:12:24,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-04-15 05:12:24,927 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:25,762 WARN L205 SmtUtils]: Spent 835.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-04-15 05:12:25,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:12:25,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:25,844 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:12:25,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-04-15 05:12:25,854 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:25,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:25,906 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:12:25,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-04-15 05:12:25,931 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:26,641 WARN L205 SmtUtils]: Spent 709.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-04-15 05:12:26,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:12:26,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:26,714 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:12:26,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-04-15 05:12:26,720 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:26,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:26,770 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:12:26,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-04-15 05:12:26,784 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:27,485 WARN L205 SmtUtils]: Spent 700.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-04-15 05:12:27,487 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:12:27,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:27,557 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:12:27,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-04-15 05:12:27,565 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:27,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:27,620 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:12:27,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-04-15 05:12:27,630 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:28,301 WARN L205 SmtUtils]: Spent 670.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-04-15 05:12:28,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:12:28,324 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-04-15 05:12:28,325 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:333, output treesize:174 [2021-04-15 05:12:28,936 WARN L205 SmtUtils]: Spent 497.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-04-15 05:12:29,356 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 20 [2021-04-15 05:12:29,492 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:12:29,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:12:29,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-04-15 05:12:29,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198931586] [2021-04-15 05:12:29,492 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:12:29,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:12:29,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:12:29,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:12:29,493 INFO L87 Difference]: Start difference. First operand 1914 states and 6494 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:12:30,308 WARN L205 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 35 [2021-04-15 05:12:30,867 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-04-15 05:12:31,295 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-04-15 05:12:31,930 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-04-15 05:12:32,524 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-04-15 05:12:33,358 WARN L205 SmtUtils]: Spent 518.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-04-15 05:12:34,228 WARN L205 SmtUtils]: Spent 633.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2021-04-15 05:12:34,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:12:34,492 INFO L93 Difference]: Finished difference Result 2483 states and 8261 transitions. [2021-04-15 05:12:34,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 05:12:34,496 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:12:34,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:12:34,500 INFO L225 Difference]: With dead ends: 2483 [2021-04-15 05:12:34,501 INFO L226 Difference]: Without dead ends: 2458 [2021-04-15 05:12:34,501 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 8277.2ms TimeCoverageRelationStatistics Valid=162, Invalid=594, Unknown=0, NotChecked=0, Total=756 [2021-04-15 05:12:34,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2458 states. [2021-04-15 05:12:34,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2458 to 1918. [2021-04-15 05:12:34,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1918 states, 1917 states have (on average 3.394887845592071) internal successors, (6508), 1917 states have internal predecessors, (6508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:12:34,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1918 states to 1918 states and 6508 transitions. [2021-04-15 05:12:34,527 INFO L78 Accepts]: Start accepts. Automaton has 1918 states and 6508 transitions. Word has length 26 [2021-04-15 05:12:34,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:12:34,528 INFO L480 AbstractCegarLoop]: Abstraction has 1918 states and 6508 transitions. [2021-04-15 05:12:34,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:12:34,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1918 states and 6508 transitions. [2021-04-15 05:12:34,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:12:34,530 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:12:34,530 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:12:34,730 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2610 [2021-04-15 05:12:34,731 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:12:34,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:12:34,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1537750790, now seen corresponding path program 42 times [2021-04-15 05:12:34,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:12:34,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581925584] [2021-04-15 05:12:34,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:12:34,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:12:35,109 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-04-15 05:12:35,475 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-04-15 05:12:35,908 WARN L205 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-04-15 05:12:36,232 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-04-15 05:12:36,488 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 16 [2021-04-15 05:12:36,729 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 12 [2021-04-15 05:12:36,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:12:36,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581925584] [2021-04-15 05:12:36,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024831206] [2021-04-15 05:12:36,734 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:12:36,756 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 05:12:36,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:12:36,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:12:36,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:12:37,348 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2021-04-15 05:12:37,582 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-04-15 05:12:37,937 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-04-15 05:12:38,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:38,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:38,106 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:12:38,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-04-15 05:12:38,111 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:38,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:38,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:38,152 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:12:38,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-04-15 05:12:38,156 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:38,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:38,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:38,212 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:12:38,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 28 [2021-04-15 05:12:38,230 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:38,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:38,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:38,312 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:12:38,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 23 [2021-04-15 05:12:38,323 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:38,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:38,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:38,426 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:12:38,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 23 [2021-04-15 05:12:38,437 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:38,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:38,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:38,503 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:12:38,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 25 [2021-04-15 05:12:38,509 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:38,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:38,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:38,576 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:12:38,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 27 [2021-04-15 05:12:38,582 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:38,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:38,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:38,642 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:12:38,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 30 [2021-04-15 05:12:38,648 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:38,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:38,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:38,702 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:12:38,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 24 [2021-04-15 05:12:38,708 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:38,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:38,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:38,769 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:12:38,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 27 [2021-04-15 05:12:38,775 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:38,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:38,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:38,836 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:12:38,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 25 [2021-04-15 05:12:38,842 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:38,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:38,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:38,922 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:12:38,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2021-04-15 05:12:38,948 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:38,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:38,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:39,032 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:12:39,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 30 [2021-04-15 05:12:39,041 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:39,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:39,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:39,120 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:12:39,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 31 [2021-04-15 05:12:39,134 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:39,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:39,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:39,219 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-04-15 05:12:39,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 24 [2021-04-15 05:12:39,227 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:39,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:39,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:39,264 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-04-15 05:12:39,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 22 [2021-04-15 05:12:39,271 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:39,838 WARN L205 SmtUtils]: Spent 566.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-04-15 05:12:39,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:12:39,844 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-04-15 05:12:39,844 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:865, output treesize:221 [2021-04-15 05:12:40,446 WARN L205 SmtUtils]: Spent 483.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-04-15 05:12:41,007 WARN L205 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2021-04-15 05:12:41,111 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:12:41,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:12:41,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-04-15 05:12:41,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136799936] [2021-04-15 05:12:41,111 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:12:41,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:12:41,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:12:41,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:12:41,112 INFO L87 Difference]: Start difference. First operand 1918 states and 6508 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:12:41,345 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-04-15 05:12:41,548 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2021-04-15 05:12:42,137 WARN L205 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-04-15 05:12:42,894 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 26 [2021-04-15 05:12:43,514 WARN L205 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 34 [2021-04-15 05:12:44,464 WARN L205 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 43 [2021-04-15 05:12:45,862 WARN L205 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 85 DAG size of output: 49 [2021-04-15 05:12:47,575 WARN L205 SmtUtils]: Spent 1.40 s on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-04-15 05:12:48,701 WARN L205 SmtUtils]: Spent 698.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 30 [2021-04-15 05:12:49,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:12:49,519 INFO L93 Difference]: Finished difference Result 2546 states and 8447 transitions. [2021-04-15 05:12:49,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 05:12:49,523 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:12:49,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:12:49,528 INFO L225 Difference]: With dead ends: 2546 [2021-04-15 05:12:49,528 INFO L226 Difference]: Without dead ends: 2510 [2021-04-15 05:12:49,528 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 9907.0ms TimeCoverageRelationStatistics Valid=172, Invalid=698, Unknown=0, NotChecked=0, Total=870 [2021-04-15 05:12:49,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2510 states. [2021-04-15 05:12:49,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2510 to 1939. [2021-04-15 05:12:49,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1939 states, 1938 states have (on average 3.4004127966976263) internal successors, (6590), 1938 states have internal predecessors, (6590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:12:49,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1939 states to 1939 states and 6590 transitions. [2021-04-15 05:12:49,553 INFO L78 Accepts]: Start accepts. Automaton has 1939 states and 6590 transitions. Word has length 26 [2021-04-15 05:12:49,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:12:49,554 INFO L480 AbstractCegarLoop]: Abstraction has 1939 states and 6590 transitions. [2021-04-15 05:12:49,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:12:49,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1939 states and 6590 transitions. [2021-04-15 05:12:49,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:12:49,556 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:12:49,556 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:12:49,757 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2643 [2021-04-15 05:12:49,757 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:12:49,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:12:49,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1872442310, now seen corresponding path program 56 times [2021-04-15 05:12:49,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:12:49,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949339467] [2021-04-15 05:12:49,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:12:49,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:12:50,195 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2021-04-15 05:12:50,389 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 17 [2021-04-15 05:12:50,622 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2021-04-15 05:12:50,900 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 21 [2021-04-15 05:12:51,305 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2021-04-15 05:12:51,690 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2021-04-15 05:12:52,050 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-04-15 05:12:52,236 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 12 [2021-04-15 05:12:52,241 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:12:52,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949339467] [2021-04-15 05:12:52,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411214206] [2021-04-15 05:12:52,241 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:12:52,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:12:52,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:12:52,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-04-15 05:12:52,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:12:52,922 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-04-15 05:12:53,300 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-04-15 05:12:53,669 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-04-15 05:12:54,149 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-04-15 05:12:55,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:55,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:55,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:55,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:12:55,347 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:55,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:55,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:55,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:55,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:12:55,398 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:55,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:55,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:55,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:55,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 16 [2021-04-15 05:12:55,449 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:55,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:55,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:55,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:55,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:12:55,501 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:55,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:55,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:55,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:55,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:12:55,561 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:55,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:55,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:55,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:55,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:12:55,607 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:55,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:55,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:55,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:55,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-04-15 05:12:55,658 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:55,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:55,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:55,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:55,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-04-15 05:12:55,713 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:55,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:55,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:55,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:55,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:12:55,757 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:55,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:55,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:55,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:55,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 16 [2021-04-15 05:12:55,806 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:55,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:55,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:55,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:55,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-04-15 05:12:55,865 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:55,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:55,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:55,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:55,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-04-15 05:12:55,917 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:55,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:55,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:55,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:55,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:12:55,967 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:55,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:55,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:56,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:56,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:12:56,022 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:56,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:56,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:56,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:56,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-04-15 05:12:56,079 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:56,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:56,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:56,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:56,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-04-15 05:12:56,134 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:56,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:56,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:56,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:56,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:12:56,184 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:56,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:56,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:56,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:56,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:12:56,241 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:56,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:56,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:56,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:56,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 16 [2021-04-15 05:12:56,297 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:56,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:56,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:56,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:56,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-04-15 05:12:56,348 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:56,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:56,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:56,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:56,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:12:56,398 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:56,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:56,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:56,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:56,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:12:56,449 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:56,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:12:56,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:12:56,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 16 [2021-04-15 05:12:56,475 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-04-15 05:12:56,722 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 17 [2021-04-15 05:12:56,724 INFO L628 ElimStorePlain]: treesize reduction 64, result has 29.7 percent of original size [2021-04-15 05:12:56,730 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 05:12:56,730 INFO L247 ElimStorePlain]: Needed 24 recursive calls to eliminate 2 variables, input treesize:956, output treesize:21 [2021-04-15 05:12:56,959 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:12:56,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:12:56,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-04-15 05:12:56,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813207476] [2021-04-15 05:12:56,960 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:12:56,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:12:56,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:12:56,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:12:56,960 INFO L87 Difference]: Start difference. First operand 1939 states and 6590 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:12:57,264 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 18 [2021-04-15 05:12:57,483 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2021-04-15 05:12:57,717 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-04-15 05:12:58,183 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2021-04-15 05:12:58,812 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-04-15 05:12:59,252 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-04-15 05:12:59,587 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-04-15 05:12:59,800 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-04-15 05:13:00,524 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-04-15 05:13:01,008 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-04-15 05:13:01,470 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-04-15 05:13:01,935 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 26 [2021-04-15 05:13:02,321 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 23 [2021-04-15 05:13:02,815 WARN L205 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-04-15 05:13:03,184 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 20 [2021-04-15 05:13:03,513 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-04-15 05:13:03,866 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2021-04-15 05:13:03,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:03,914 INFO L93 Difference]: Finished difference Result 2586 states and 8224 transitions. [2021-04-15 05:13:03,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 05:13:03,918 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:13:03,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:03,922 INFO L225 Difference]: With dead ends: 2586 [2021-04-15 05:13:03,922 INFO L226 Difference]: Without dead ends: 2556 [2021-04-15 05:13:03,922 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 9014.0ms TimeCoverageRelationStatistics Valid=284, Invalid=1198, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 05:13:03,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2021-04-15 05:13:03,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 1967. [2021-04-15 05:13:03,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1967 states, 1966 states have (on average 3.399796541200407) internal successors, (6684), 1966 states have internal predecessors, (6684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:03,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1967 states to 1967 states and 6684 transitions. [2021-04-15 05:13:03,948 INFO L78 Accepts]: Start accepts. Automaton has 1967 states and 6684 transitions. Word has length 26 [2021-04-15 05:13:03,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:03,948 INFO L480 AbstractCegarLoop]: Abstraction has 1967 states and 6684 transitions. [2021-04-15 05:13:03,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:03,948 INFO L276 IsEmpty]: Start isEmpty. Operand 1967 states and 6684 transitions. [2021-04-15 05:13:03,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:13:03,950 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:03,950 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:13:04,150 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2661 [2021-04-15 05:13:04,151 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:04,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:04,151 INFO L82 PathProgramCache]: Analyzing trace with hash -401364192, now seen corresponding path program 57 times [2021-04-15 05:13:04,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:04,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008891354] [2021-04-15 05:13:04,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:04,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:04,572 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2021-04-15 05:13:04,733 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 17 [2021-04-15 05:13:04,940 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2021-04-15 05:13:05,189 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 21 [2021-04-15 05:13:05,563 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2021-04-15 05:13:05,947 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2021-04-15 05:13:06,307 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-04-15 05:13:06,477 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 12 [2021-04-15 05:13:06,482 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:06,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008891354] [2021-04-15 05:13:06,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167010804] [2021-04-15 05:13:06,482 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:13:06,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 05:13:06,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:13:06,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:13:06,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:13:07,035 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2021-04-15 05:13:07,281 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-04-15 05:13:07,741 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-04-15 05:13:09,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:09,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:09,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:09,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:09,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:09,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:09,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 13 [2021-04-15 05:13:09,222 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:09,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:09,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:09,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:09,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:09,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:09,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:09,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-04-15 05:13:09,279 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:09,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:09,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:09,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:09,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:09,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:09,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:09,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-04-15 05:13:09,331 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:09,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:09,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:09,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:09,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:09,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:09,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:09,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-04-15 05:13:09,391 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:09,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:09,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:09,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:09,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:09,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:09,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:09,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 13 [2021-04-15 05:13:09,446 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:09,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:09,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:09,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:09,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:09,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:09,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:09,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-04-15 05:13:09,502 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:09,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:09,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:09,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:09,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:09,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:09,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:09,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-04-15 05:13:09,562 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:09,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:09,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:09,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:09,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:09,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:09,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:09,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-04-15 05:13:09,629 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:09,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:09,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:09,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:09,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:09,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:09,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:09,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 16 [2021-04-15 05:13:09,684 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:09,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:09,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:09,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:09,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:09,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:09,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:09,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-04-15 05:13:09,745 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:09,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:09,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:09,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:09,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:09,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:09,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:09,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-04-15 05:13:09,802 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:09,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:09,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:09,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:09,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:09,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:09,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:09,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2021-04-15 05:13:09,866 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:09,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:09,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:09,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:09,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:09,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:09,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:09,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-04-15 05:13:09,922 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:09,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:09,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:09,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:09,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:09,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:09,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:09,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-04-15 05:13:09,970 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:09,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:09,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:09,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:09,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:10,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:10,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:10,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2021-04-15 05:13:10,016 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:10,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:10,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:10,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:10,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:10,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-04-15 05:13:10,039 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:10,234 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 16 [2021-04-15 05:13:10,235 INFO L628 ElimStorePlain]: treesize reduction 16, result has 67.3 percent of original size [2021-04-15 05:13:10,241 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 05:13:10,241 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:761, output treesize:21 [2021-04-15 05:13:10,441 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:10,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:13:10,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-04-15 05:13:10,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957265890] [2021-04-15 05:13:10,442 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:13:10,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:10,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:13:10,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:13:10,442 INFO L87 Difference]: Start difference. First operand 1967 states and 6684 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:10,704 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 18 [2021-04-15 05:13:11,017 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 25 [2021-04-15 05:13:11,187 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2021-04-15 05:13:11,407 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-04-15 05:13:11,684 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 26 [2021-04-15 05:13:11,972 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-04-15 05:13:12,244 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-04-15 05:13:12,740 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-04-15 05:13:13,041 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-04-15 05:13:13,297 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-04-15 05:13:13,758 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 33 [2021-04-15 05:13:14,327 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-04-15 05:13:14,882 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-04-15 05:13:15,450 WARN L205 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2021-04-15 05:13:15,994 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-04-15 05:13:16,759 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 25 [2021-04-15 05:13:17,242 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-04-15 05:13:17,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:17,310 INFO L93 Difference]: Finished difference Result 2698 states and 8750 transitions. [2021-04-15 05:13:17,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 05:13:17,314 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:13:17,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:17,319 INFO L225 Difference]: With dead ends: 2698 [2021-04-15 05:13:17,319 INFO L226 Difference]: Without dead ends: 2661 [2021-04-15 05:13:17,320 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 8418.6ms TimeCoverageRelationStatistics Valid=303, Invalid=1103, Unknown=0, NotChecked=0, Total=1406 [2021-04-15 05:13:17,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2661 states. [2021-04-15 05:13:17,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2661 to 1989. [2021-04-15 05:13:17,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1989 states, 1988 states have (on average 3.397887323943662) internal successors, (6755), 1988 states have internal predecessors, (6755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:17,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1989 states to 1989 states and 6755 transitions. [2021-04-15 05:13:17,351 INFO L78 Accepts]: Start accepts. Automaton has 1989 states and 6755 transitions. Word has length 26 [2021-04-15 05:13:17,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:17,351 INFO L480 AbstractCegarLoop]: Abstraction has 1989 states and 6755 transitions. [2021-04-15 05:13:17,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:17,351 INFO L276 IsEmpty]: Start isEmpty. Operand 1989 states and 6755 transitions. [2021-04-15 05:13:17,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:13:17,353 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:17,353 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:13:17,554 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2730 [2021-04-15 05:13:17,554 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:17,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:17,554 INFO L82 PathProgramCache]: Analyzing trace with hash -804567746, now seen corresponding path program 58 times [2021-04-15 05:13:17,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:17,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278012958] [2021-04-15 05:13:17,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:17,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:17,961 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-04-15 05:13:18,133 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 17 [2021-04-15 05:13:18,359 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-04-15 05:13:18,572 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2021-04-15 05:13:18,894 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2021-04-15 05:13:19,281 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-04-15 05:13:19,489 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2021-04-15 05:13:19,685 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 13 [2021-04-15 05:13:19,691 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:19,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278012958] [2021-04-15 05:13:19,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202184120] [2021-04-15 05:13:19,691 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:13:19,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:13:19,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:13:19,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:13:19,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:13:20,423 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-04-15 05:13:21,212 WARN L205 SmtUtils]: Spent 544.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-04-15 05:13:21,489 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_310, v_prenex_312], 5=[A, v_prenex_314]} [2021-04-15 05:13:21,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:21,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:21,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-04-15 05:13:21,511 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:22,254 WARN L205 SmtUtils]: Spent 742.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-04-15 05:13:22,256 INFO L628 ElimStorePlain]: treesize reduction 142, result has 45.2 percent of original size [2021-04-15 05:13:22,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:22,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:22,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-04-15 05:13:22,283 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:22,528 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-04-15 05:13:22,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:22,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:22,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:22,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-04-15 05:13:22,554 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:22,785 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-04-15 05:13:22,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:22,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:22,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:22,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:22,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 05:13:22,815 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:22,992 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-04-15 05:13:22,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:23,002 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-04-15 05:13:23,002 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:294, output treesize:31 [2021-04-15 05:13:23,162 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:23,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:13:23,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-04-15 05:13:23,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839885110] [2021-04-15 05:13:23,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:13:23,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:23,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:13:23,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:13:23,163 INFO L87 Difference]: Start difference. First operand 1989 states and 6755 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:23,392 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 18 [2021-04-15 05:13:23,540 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2021-04-15 05:13:23,826 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 22 [2021-04-15 05:13:24,460 WARN L205 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 29 [2021-04-15 05:13:24,838 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-04-15 05:13:25,611 WARN L205 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-04-15 05:13:26,440 WARN L205 SmtUtils]: Spent 712.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-04-15 05:13:26,975 WARN L205 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2021-04-15 05:13:27,447 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2021-04-15 05:13:27,719 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2021-04-15 05:13:28,186 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-04-15 05:13:29,014 WARN L205 SmtUtils]: Spent 552.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-04-15 05:13:29,850 WARN L205 SmtUtils]: Spent 685.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-04-15 05:13:30,654 WARN L205 SmtUtils]: Spent 656.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-04-15 05:13:31,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:31,105 INFO L93 Difference]: Finished difference Result 2419 states and 8049 transitions. [2021-04-15 05:13:31,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 05:13:31,110 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:13:31,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:31,113 INFO L225 Difference]: With dead ends: 2419 [2021-04-15 05:13:31,113 INFO L226 Difference]: Without dead ends: 2388 [2021-04-15 05:13:31,114 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 9830.4ms TimeCoverageRelationStatistics Valid=251, Invalid=871, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 05:13:31,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2388 states. [2021-04-15 05:13:31,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2388 to 1985. [2021-04-15 05:13:31,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1985 states, 1984 states have (on average 3.391633064516129) internal successors, (6729), 1984 states have internal predecessors, (6729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:31,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1985 states to 1985 states and 6729 transitions. [2021-04-15 05:13:31,139 INFO L78 Accepts]: Start accepts. Automaton has 1985 states and 6729 transitions. Word has length 26 [2021-04-15 05:13:31,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:31,139 INFO L480 AbstractCegarLoop]: Abstraction has 1985 states and 6729 transitions. [2021-04-15 05:13:31,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:31,139 INFO L276 IsEmpty]: Start isEmpty. Operand 1985 states and 6729 transitions. [2021-04-15 05:13:31,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:13:31,141 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:31,142 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:13:31,343 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2826,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:13:31,344 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:31,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:31,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1833133118, now seen corresponding path program 59 times [2021-04-15 05:13:31,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:31,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551163737] [2021-04-15 05:13:31,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:31,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:31,630 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-04-15 05:13:31,782 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 17 [2021-04-15 05:13:31,984 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-04-15 05:13:32,210 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2021-04-15 05:13:32,665 WARN L205 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2021-04-15 05:13:33,020 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 29 [2021-04-15 05:13:33,207 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2021-04-15 05:13:33,371 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 14 [2021-04-15 05:13:33,374 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:33,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551163737] [2021-04-15 05:13:33,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110421886] [2021-04-15 05:13:33,375 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:13:33,395 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 05:13:33,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:13:33,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:13:33,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:13:34,113 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-04-15 05:13:34,422 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-04-15 05:13:34,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:34,640 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 13 [2021-04-15 05:13:34,645 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:34,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:34,665 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 13 [2021-04-15 05:13:34,670 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:34,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:34,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 16 [2021-04-15 05:13:34,695 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:34,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:34,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 16 [2021-04-15 05:13:34,721 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:34,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:34,740 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 16 [2021-04-15 05:13:34,746 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:34,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:34,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-04-15 05:13:34,771 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:34,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:34,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 13 [2021-04-15 05:13:34,798 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:34,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:34,817 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 31 treesize of output 13 [2021-04-15 05:13:34,823 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:34,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:34,843 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 34 treesize of output 16 [2021-04-15 05:13:34,848 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:34,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:34,868 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 41 treesize of output 19 [2021-04-15 05:13:34,873 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:34,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:34,893 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 16 [2021-04-15 05:13:34,899 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:34,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:34,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-04-15 05:13:34,924 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:34,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:34,944 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 41 treesize of output 19 [2021-04-15 05:13:34,949 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:34,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:34,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-04-15 05:13:34,974 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:34,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:34,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 13 [2021-04-15 05:13:34,999 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:35,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:35,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-04-15 05:13:35,018 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:35,205 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 16 [2021-04-15 05:13:35,207 INFO L628 ElimStorePlain]: treesize reduction 34, result has 49.3 percent of original size [2021-04-15 05:13:35,212 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 05:13:35,212 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-04-15 05:13:35,436 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:35,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:13:35,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-04-15 05:13:35,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443186833] [2021-04-15 05:13:35,436 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:13:35,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:35,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:13:35,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:13:35,437 INFO L87 Difference]: Start difference. First operand 1985 states and 6729 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:35,685 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 18 [2021-04-15 05:13:35,884 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 19 [2021-04-15 05:13:36,755 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-04-15 05:13:37,056 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 29 [2021-04-15 05:13:37,803 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 37 [2021-04-15 05:13:38,869 WARN L205 SmtUtils]: Spent 808.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-04-15 05:13:39,457 WARN L205 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-04-15 05:13:39,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:39,804 INFO L93 Difference]: Finished difference Result 2096 states and 7003 transitions. [2021-04-15 05:13:39,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 05:13:39,807 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:13:39,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:39,810 INFO L225 Difference]: With dead ends: 2096 [2021-04-15 05:13:39,810 INFO L226 Difference]: Without dead ends: 2081 [2021-04-15 05:13:39,810 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 5952.5ms TimeCoverageRelationStatistics Valid=160, Invalid=596, Unknown=0, NotChecked=0, Total=756 [2021-04-15 05:13:39,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2081 states. [2021-04-15 05:13:39,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2081 to 1995. [2021-04-15 05:13:39,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1995 states, 1994 states have (on average 3.3931795386158474) internal successors, (6766), 1994 states have internal predecessors, (6766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:39,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1995 states to 1995 states and 6766 transitions. [2021-04-15 05:13:39,831 INFO L78 Accepts]: Start accepts. Automaton has 1995 states and 6766 transitions. Word has length 26 [2021-04-15 05:13:39,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:39,832 INFO L480 AbstractCegarLoop]: Abstraction has 1995 states and 6766 transitions. [2021-04-15 05:13:39,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:39,832 INFO L276 IsEmpty]: Start isEmpty. Operand 1995 states and 6766 transitions. [2021-04-15 05:13:39,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:13:39,834 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:39,834 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:13:40,036 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2840 [2021-04-15 05:13:40,037 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:40,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:40,037 INFO L82 PathProgramCache]: Analyzing trace with hash 179857598, now seen corresponding path program 43 times [2021-04-15 05:13:40,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:40,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117704579] [2021-04-15 05:13:40,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:40,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:40,592 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2021-04-15 05:13:41,035 WARN L205 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-04-15 05:13:41,439 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-04-15 05:13:41,818 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-04-15 05:13:42,126 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-04-15 05:13:42,272 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 12 [2021-04-15 05:13:42,276 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:42,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117704579] [2021-04-15 05:13:42,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253175126] [2021-04-15 05:13:42,276 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:13:42,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:42,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:13:42,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:13:42,804 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-04-15 05:13:43,127 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-04-15 05:13:43,438 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-04-15 05:13:44,797 WARN L205 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-04-15 05:13:45,024 INFO L446 ElimStorePlain]: Different costs {2=[A, v_prenex_318], 3=[v_prenex_316, v_prenex_320]} [2021-04-15 05:13:45,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:45,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:45,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:45,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-04-15 05:13:45,058 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:45,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:45,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:45,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:13:45,081 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:45,849 WARN L205 SmtUtils]: Spent 767.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-04-15 05:13:45,851 INFO L628 ElimStorePlain]: treesize reduction 119, result has 50.4 percent of original size [2021-04-15 05:13:45,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:45,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:45,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:13:45,873 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:46,124 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-04-15 05:13:46,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:46,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:46,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-04-15 05:13:46,147 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:46,402 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-04-15 05:13:46,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:46,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:46,414 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 13 treesize of output 7 [2021-04-15 05:13:46,422 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:46,649 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-04-15 05:13:46,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:13:46,658 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-04-15 05:13:46,658 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 7 variables, input treesize:281, output treesize:56 [2021-04-15 05:13:46,881 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2021-04-15 05:13:46,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:46,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:13:46,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-04-15 05:13:46,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571151657] [2021-04-15 05:13:46,973 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:13:46,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:46,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:13:46,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:13:46,974 INFO L87 Difference]: Start difference. First operand 1995 states and 6766 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:47,295 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 24 [2021-04-15 05:13:47,493 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-04-15 05:13:47,926 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-04-15 05:13:48,545 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 31 [2021-04-15 05:13:49,020 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-04-15 05:13:49,600 WARN L205 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2021-04-15 05:13:50,090 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2021-04-15 05:13:50,703 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-04-15 05:13:51,661 WARN L205 SmtUtils]: Spent 851.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2021-04-15 05:13:52,539 WARN L205 SmtUtils]: Spent 619.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-04-15 05:13:53,000 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-04-15 05:13:53,271 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-04-15 05:13:53,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:13:53,377 INFO L93 Difference]: Finished difference Result 2554 states and 8430 transitions. [2021-04-15 05:13:53,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 05:13:53,381 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:13:53,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:13:53,385 INFO L225 Difference]: With dead ends: 2554 [2021-04-15 05:13:53,385 INFO L226 Difference]: Without dead ends: 2539 [2021-04-15 05:13:53,386 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 9059.2ms TimeCoverageRelationStatistics Valid=207, Invalid=723, Unknown=0, NotChecked=0, Total=930 [2021-04-15 05:13:53,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2539 states. [2021-04-15 05:13:53,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2539 to 2003. [2021-04-15 05:13:53,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2003 states, 2002 states have (on average 3.3916083916083917) internal successors, (6790), 2002 states have internal predecessors, (6790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:53,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2003 states to 2003 states and 6790 transitions. [2021-04-15 05:13:53,412 INFO L78 Accepts]: Start accepts. Automaton has 2003 states and 6790 transitions. Word has length 26 [2021-04-15 05:13:53,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:13:53,412 INFO L480 AbstractCegarLoop]: Abstraction has 2003 states and 6790 transitions. [2021-04-15 05:13:53,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:53,412 INFO L276 IsEmpty]: Start isEmpty. Operand 2003 states and 6790 transitions. [2021-04-15 05:13:53,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:13:53,414 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:13:53,415 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:13:53,615 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2854,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:13:53,615 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:13:53,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:13:53,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1730239162, now seen corresponding path program 60 times [2021-04-15 05:13:53,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:13:53,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35596389] [2021-04-15 05:13:53,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:13:53,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:13:53,826 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2021-04-15 05:13:54,025 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-04-15 05:13:54,168 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2021-04-15 05:13:54,437 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-04-15 05:13:54,714 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-04-15 05:13:54,970 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-04-15 05:13:55,124 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2021-04-15 05:13:55,127 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:55,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35596389] [2021-04-15 05:13:55,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393678188] [2021-04-15 05:13:55,128 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:13:55,160 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 05:13:55,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:13:55,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:13:55,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:13:55,670 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-04-15 05:13:55,957 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-04-15 05:13:56,262 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-04-15 05:13:57,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:57,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:57,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:57,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:57,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:57,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-04-15 05:13:57,559 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:57,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:57,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:57,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:57,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:57,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:57,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-04-15 05:13:57,595 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:57,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:57,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:57,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:57,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:57,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:57,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-04-15 05:13:57,632 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:57,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:57,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:57,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:57,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:57,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:57,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-04-15 05:13:57,674 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:57,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:57,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:57,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:57,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:57,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:57,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-04-15 05:13:57,710 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:57,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:57,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:57,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:57,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:57,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:57,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-04-15 05:13:57,753 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:57,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:57,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:57,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:57,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:57,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:57,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-04-15 05:13:57,789 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:57,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:57,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:57,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:57,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:57,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:57,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-04-15 05:13:57,827 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:57,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:57,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:57,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:57,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:57,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:57,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-04-15 05:13:57,866 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:57,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:57,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:57,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:57,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:57,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:57,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-04-15 05:13:57,898 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:57,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:57,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:57,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:57,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:57,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:57,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-04-15 05:13:57,933 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:57,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:57,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:57,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:57,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:57,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:57,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-04-15 05:13:57,966 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:57,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:57,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:57,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:57,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:57,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:57,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-04-15 05:13:58,000 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:58,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:58,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:58,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:58,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:58,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:58,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-04-15 05:13:58,026 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:58,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:58,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:13:58,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:13:58,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-04-15 05:13:58,042 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:13:58,187 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 16 [2021-04-15 05:13:58,188 INFO L628 ElimStorePlain]: treesize reduction 16, result has 62.8 percent of original size [2021-04-15 05:13:58,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 05:13:58,193 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-04-15 05:13:58,280 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:13:58,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:13:58,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-04-15 05:13:58,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227399116] [2021-04-15 05:13:58,281 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:13:58,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:13:58,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:13:58,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:13:58,281 INFO L87 Difference]: Start difference. First operand 2003 states and 6790 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:13:58,522 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-04-15 05:13:59,123 WARN L205 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-04-15 05:13:59,717 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2021-04-15 05:14:00,125 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2021-04-15 05:14:00,424 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-04-15 05:14:00,972 WARN L205 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2021-04-15 05:14:01,711 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-04-15 05:14:02,326 WARN L205 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-04-15 05:14:02,645 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-04-15 05:14:03,469 WARN L205 SmtUtils]: Spent 690.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-04-15 05:14:04,012 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-04-15 05:14:04,423 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2021-04-15 05:14:04,597 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-04-15 05:14:04,906 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-04-15 05:14:05,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:14:05,024 INFO L93 Difference]: Finished difference Result 2567 states and 8303 transitions. [2021-04-15 05:14:05,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 05:14:05,027 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:14:05,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:14:05,031 INFO L225 Difference]: With dead ends: 2567 [2021-04-15 05:14:05,031 INFO L226 Difference]: Without dead ends: 2545 [2021-04-15 05:14:05,032 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 7587.3ms TimeCoverageRelationStatistics Valid=225, Invalid=897, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 05:14:05,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2545 states. [2021-04-15 05:14:05,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2545 to 2012. [2021-04-15 05:14:05,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2012 states, 2011 states have (on average 3.399801093983093) internal successors, (6837), 2011 states have internal predecessors, (6837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:05,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2012 states to 2012 states and 6837 transitions. [2021-04-15 05:14:05,058 INFO L78 Accepts]: Start accepts. Automaton has 2012 states and 6837 transitions. Word has length 26 [2021-04-15 05:14:05,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:14:05,058 INFO L480 AbstractCegarLoop]: Abstraction has 2012 states and 6837 transitions. [2021-04-15 05:14:05,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:05,058 INFO L276 IsEmpty]: Start isEmpty. Operand 2012 states and 6837 transitions. [2021-04-15 05:14:05,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:14:05,060 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:14:05,060 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:14:05,260 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2865 [2021-04-15 05:14:05,261 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:14:05,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:14:05,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1769727974, now seen corresponding path program 44 times [2021-04-15 05:14:05,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:14:05,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934722686] [2021-04-15 05:14:05,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:14:05,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:05,703 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2021-04-15 05:14:06,244 WARN L205 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2021-04-15 05:14:06,421 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-04-15 05:14:06,567 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-04-15 05:14:06,716 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-04-15 05:14:06,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:06,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934722686] [2021-04-15 05:14:06,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708944411] [2021-04-15 05:14:06,834 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:06,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:14:06,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:14:06,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-04-15 05:14:06,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:14:07,522 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-04-15 05:14:08,247 WARN L205 SmtUtils]: Spent 547.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-04-15 05:14:09,059 WARN L205 SmtUtils]: Spent 537.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 55 [2021-04-15 05:14:09,326 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_328], 2=[A, v_prenex_329]} [2021-04-15 05:14:09,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:09,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-04-15 05:14:09,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:09,912 WARN L205 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-04-15 05:14:09,913 INFO L628 ElimStorePlain]: treesize reduction 54, result has 69.8 percent of original size [2021-04-15 05:14:09,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:09,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:09,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:09,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-04-15 05:14:09,942 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:09,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:09,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:09,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:14:09,959 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:10,174 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-04-15 05:14:10,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:14:10,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:10,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:14:10,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-04-15 05:14:10,193 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:10,382 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-04-15 05:14:10,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:14:10,390 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-04-15 05:14:10,390 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:193, output treesize:51 [2021-04-15 05:14:10,580 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2021-04-15 05:14:10,656 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:10,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:14:10,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-04-15 05:14:10,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481360567] [2021-04-15 05:14:10,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:14:10,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:14:10,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:14:10,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:14:10,656 INFO L87 Difference]: Start difference. First operand 2012 states and 6837 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:10,895 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 25 [2021-04-15 05:14:11,117 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-04-15 05:14:11,487 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-04-15 05:14:11,972 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 32 [2021-04-15 05:14:12,439 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-04-15 05:14:13,612 WARN L205 SmtUtils]: Spent 888.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2021-04-15 05:14:14,021 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2021-04-15 05:14:15,010 WARN L205 SmtUtils]: Spent 755.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2021-04-15 05:14:15,484 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-04-15 05:14:16,168 WARN L205 SmtUtils]: Spent 551.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2021-04-15 05:14:17,488 WARN L205 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-04-15 05:14:18,447 WARN L205 SmtUtils]: Spent 889.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 68 [2021-04-15 05:14:20,238 WARN L205 SmtUtils]: Spent 1.52 s on a formula simplification. DAG size of input: 94 DAG size of output: 75 [2021-04-15 05:14:21,436 WARN L205 SmtUtils]: Spent 955.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 74 [2021-04-15 05:14:21,958 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-04-15 05:14:22,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:14:22,294 INFO L93 Difference]: Finished difference Result 2646 states and 8732 transitions. [2021-04-15 05:14:22,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 05:14:22,299 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:14:22,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:14:22,303 INFO L225 Difference]: With dead ends: 2646 [2021-04-15 05:14:22,303 INFO L226 Difference]: Without dead ends: 2631 [2021-04-15 05:14:22,303 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 12906.5ms TimeCoverageRelationStatistics Valid=237, Invalid=885, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 05:14:22,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2631 states. [2021-04-15 05:14:22,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2631 to 2017. [2021-04-15 05:14:22,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2017 states, 2016 states have (on average 3.4007936507936507) internal successors, (6856), 2016 states have internal predecessors, (6856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:22,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2017 states to 2017 states and 6856 transitions. [2021-04-15 05:14:22,331 INFO L78 Accepts]: Start accepts. Automaton has 2017 states and 6856 transitions. Word has length 26 [2021-04-15 05:14:22,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:14:22,331 INFO L480 AbstractCegarLoop]: Abstraction has 2017 states and 6856 transitions. [2021-04-15 05:14:22,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:22,331 INFO L276 IsEmpty]: Start isEmpty. Operand 2017 states and 6856 transitions. [2021-04-15 05:14:22,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:14:22,334 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:14:22,334 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:14:22,534 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2979 [2021-04-15 05:14:22,534 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:14:22,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:14:22,534 INFO L82 PathProgramCache]: Analyzing trace with hash 152195194, now seen corresponding path program 45 times [2021-04-15 05:14:22,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:14:22,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237709083] [2021-04-15 05:14:22,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:14:22,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:22,970 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-04-15 05:14:23,380 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-04-15 05:14:23,853 WARN L205 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-04-15 05:14:24,331 WARN L205 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-04-15 05:14:24,463 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 16 [2021-04-15 05:14:24,595 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:24,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237709083] [2021-04-15 05:14:24,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000183487] [2021-04-15 05:14:24,596 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:24,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 05:14:24,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:14:24,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:14:24,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:14:25,062 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-04-15 05:14:25,937 WARN L205 SmtUtils]: Spent 636.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-04-15 05:14:26,772 WARN L205 SmtUtils]: Spent 517.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-04-15 05:14:27,213 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_350, v_prenex_342, v_prenex_337], 6=[v_prenex_339, v_prenex_344, v_prenex_346, v_prenex_348]} [2021-04-15 05:14:27,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:27,323 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-04-15 05:14:27,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-04-15 05:14:27,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:28,875 WARN L205 SmtUtils]: Spent 1.55 s on a formula simplification. DAG size of input: 172 DAG size of output: 156 [2021-04-15 05:14:28,876 INFO L628 ElimStorePlain]: treesize reduction 226, result has 61.6 percent of original size [2021-04-15 05:14:28,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:28,940 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:14:28,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-04-15 05:14:28,951 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:30,265 WARN L205 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 155 DAG size of output: 152 [2021-04-15 05:14:30,267 INFO L628 ElimStorePlain]: treesize reduction 8, result has 97.7 percent of original size [2021-04-15 05:14:30,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:30,379 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-04-15 05:14:30,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-04-15 05:14:30,386 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:31,034 WARN L205 SmtUtils]: Spent 647.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2021-04-15 05:14:31,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:14:31,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:31,131 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-04-15 05:14:31,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-04-15 05:14:31,146 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:31,802 WARN L205 SmtUtils]: Spent 654.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2021-04-15 05:14:31,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:14:31,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:31,899 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-04-15 05:14:31,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-04-15 05:14:31,907 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:32,501 WARN L205 SmtUtils]: Spent 592.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2021-04-15 05:14:32,502 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:14:32,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:32,591 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-04-15 05:14:32,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 24 [2021-04-15 05:14:32,597 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:33,154 WARN L205 SmtUtils]: Spent 556.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2021-04-15 05:14:33,155 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:14:33,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:33,222 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:14:33,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 32 [2021-04-15 05:14:33,247 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:34,393 WARN L205 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 128 DAG size of output: 123 [2021-04-15 05:14:34,394 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.9 percent of original size [2021-04-15 05:14:34,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:14:34,452 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:14:34,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-04-15 05:14:34,490 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:14:35,011 WARN L205 SmtUtils]: Spent 520.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-04-15 05:14:35,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:14:35,060 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-04-15 05:14:35,060 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 24 variables, input treesize:599, output treesize:323 [2021-04-15 05:14:36,053 WARN L205 SmtUtils]: Spent 907.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2021-04-15 05:14:36,404 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 22 [2021-04-15 05:14:36,498 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:14:36,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:14:36,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-04-15 05:14:36,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779017631] [2021-04-15 05:14:36,498 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:14:36,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:14:36,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:14:36,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:14:36,498 INFO L87 Difference]: Start difference. First operand 2017 states and 6856 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:36,760 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 25 [2021-04-15 05:14:37,027 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 20 [2021-04-15 05:14:37,225 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-04-15 05:14:37,799 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-04-15 05:14:38,456 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 26 [2021-04-15 05:14:38,796 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 32 [2021-04-15 05:14:39,800 WARN L205 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2021-04-15 05:14:40,157 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 37 [2021-04-15 05:14:40,682 WARN L205 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 40 [2021-04-15 05:14:42,429 WARN L205 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 95 DAG size of output: 89 [2021-04-15 05:14:43,304 WARN L205 SmtUtils]: Spent 770.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-04-15 05:14:43,692 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-04-15 05:14:44,455 WARN L205 SmtUtils]: Spent 430.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-04-15 05:14:44,754 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-04-15 05:14:47,330 WARN L205 SmtUtils]: Spent 2.42 s on a formula simplification. DAG size of input: 79 DAG size of output: 57 [2021-04-15 05:14:48,888 WARN L205 SmtUtils]: Spent 1.37 s on a formula simplification. DAG size of input: 126 DAG size of output: 111 [2021-04-15 05:14:50,725 WARN L205 SmtUtils]: Spent 1.75 s on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2021-04-15 05:14:52,815 WARN L205 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 135 DAG size of output: 115 [2021-04-15 05:14:56,898 WARN L205 SmtUtils]: Spent 3.94 s on a formula simplification. DAG size of input: 97 DAG size of output: 78 [2021-04-15 05:14:58,110 WARN L205 SmtUtils]: Spent 767.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 33 [2021-04-15 05:14:58,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:14:58,406 INFO L93 Difference]: Finished difference Result 2860 states and 9360 transitions. [2021-04-15 05:14:58,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 05:14:58,411 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:14:58,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:14:58,416 INFO L225 Difference]: With dead ends: 2860 [2021-04-15 05:14:58,416 INFO L226 Difference]: Without dead ends: 2845 [2021-04-15 05:14:58,416 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 24218.0ms TimeCoverageRelationStatistics Valid=353, Invalid=1129, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 05:14:58,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2845 states. [2021-04-15 05:14:58,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2845 to 2025. [2021-04-15 05:14:58,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2025 states, 2024 states have (on average 3.399703557312253) internal successors, (6881), 2024 states have internal predecessors, (6881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:58,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2025 states to 2025 states and 6881 transitions. [2021-04-15 05:14:58,442 INFO L78 Accepts]: Start accepts. Automaton has 2025 states and 6881 transitions. Word has length 26 [2021-04-15 05:14:58,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:14:58,442 INFO L480 AbstractCegarLoop]: Abstraction has 2025 states and 6881 transitions. [2021-04-15 05:14:58,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:14:58,443 INFO L276 IsEmpty]: Start isEmpty. Operand 2025 states and 6881 transitions. [2021-04-15 05:14:58,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:14:58,445 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:14:58,445 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:14:58,645 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2988,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:14:58,645 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:14:58,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:14:58,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1956232686, now seen corresponding path program 61 times [2021-04-15 05:14:58,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:14:58,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883137421] [2021-04-15 05:14:58,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:14:58,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:14:59,031 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-04-15 05:14:59,188 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2021-04-15 05:14:59,427 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-04-15 05:14:59,673 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-04-15 05:14:59,918 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-04-15 05:15:00,077 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2021-04-15 05:15:00,080 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:00,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883137421] [2021-04-15 05:15:00,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984579483] [2021-04-15 05:15:00,081 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:15:00,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:15:00,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:15:00,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:15:01,189 WARN L205 SmtUtils]: Spent 537.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-04-15 05:15:02,020 WARN L205 SmtUtils]: Spent 587.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-04-15 05:15:02,999 WARN L205 SmtUtils]: Spent 630.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 58 [2021-04-15 05:15:03,499 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_360], 6=[v_prenex_362, v_prenex_358]} [2021-04-15 05:15:03,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:03,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:03,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:03,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-04-15 05:15:03,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:03,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:03,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:03,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-04-15 05:15:03,555 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:04,265 WARN L205 SmtUtils]: Spent 709.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 64 [2021-04-15 05:15:04,267 INFO L628 ElimStorePlain]: treesize reduction 157, result has 47.0 percent of original size [2021-04-15 05:15:04,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:04,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-04-15 05:15:04,288 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:04,519 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-04-15 05:15:04,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:15:04,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:04,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:04,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 05:15:04,545 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:04,776 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-04-15 05:15:04,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:15:04,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:15:04,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:04,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-04-15 05:15:04,822 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:05,035 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-04-15 05:15:05,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:15:05,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-04-15 05:15:05,046 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 12 variables, input treesize:357, output treesize:33 [2021-04-15 05:15:05,166 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:05,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:15:05,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-04-15 05:15:05,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326983131] [2021-04-15 05:15:05,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:15:05,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:15:05,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:15:05,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:15:05,167 INFO L87 Difference]: Start difference. First operand 2025 states and 6881 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:05,547 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 22 [2021-04-15 05:15:05,805 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-04-15 05:15:06,133 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-04-15 05:15:06,977 WARN L205 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2021-04-15 05:15:07,321 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-04-15 05:15:08,200 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-04-15 05:15:09,177 WARN L205 SmtUtils]: Spent 831.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 33 [2021-04-15 05:15:09,521 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-04-15 05:15:10,295 WARN L205 SmtUtils]: Spent 569.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-04-15 05:15:10,825 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-04-15 05:15:12,673 WARN L205 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2021-04-15 05:15:13,769 WARN L205 SmtUtils]: Spent 737.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-04-15 05:15:15,629 WARN L205 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 121 DAG size of output: 76 [2021-04-15 05:15:16,350 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2021-04-15 05:15:16,931 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 26 [2021-04-15 05:15:17,178 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-04-15 05:15:17,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:15:17,417 INFO L93 Difference]: Finished difference Result 2877 states and 9256 transitions. [2021-04-15 05:15:17,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 05:15:17,426 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have 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 [2021-04-15 05:15:17,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:15:17,430 INFO L225 Difference]: With dead ends: 2877 [2021-04-15 05:15:17,431 INFO L226 Difference]: Without dead ends: 2847 [2021-04-15 05:15:17,431 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 12963.5ms TimeCoverageRelationStatistics Valid=283, Invalid=1123, Unknown=0, NotChecked=0, Total=1406 [2021-04-15 05:15:17,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2847 states. [2021-04-15 05:15:17,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2847 to 2076. [2021-04-15 05:15:17,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2076 states, 2075 states have (on average 3.4033734939759035) internal successors, (7062), 2075 states have internal predecessors, (7062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:17,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2076 states to 2076 states and 7062 transitions. [2021-04-15 05:15:17,459 INFO L78 Accepts]: Start accepts. Automaton has 2076 states and 7062 transitions. Word has length 26 [2021-04-15 05:15:17,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:15:17,459 INFO L480 AbstractCegarLoop]: Abstraction has 2076 states and 7062 transitions. [2021-04-15 05:15:17,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:17,459 INFO L276 IsEmpty]: Start isEmpty. Operand 2076 states and 7062 transitions. [2021-04-15 05:15:17,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:15:17,462 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:15:17,462 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:15:17,663 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3029,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:15:17,663 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:15:17,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:15:17,663 INFO L82 PathProgramCache]: Analyzing trace with hash -505085958, now seen corresponding path program 62 times [2021-04-15 05:15:17,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:15:17,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91055787] [2021-04-15 05:15:17,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:15:17,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:15:17,883 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2021-04-15 05:15:18,094 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-04-15 05:15:18,268 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2021-04-15 05:15:18,534 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-04-15 05:15:18,799 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-04-15 05:15:18,947 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 17 [2021-04-15 05:15:19,095 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2021-04-15 05:15:19,098 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:19,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91055787] [2021-04-15 05:15:19,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350424310] [2021-04-15 05:15:19,098 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:15:19,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:15:19,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:15:19,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:15:19,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:15:19,614 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-04-15 05:15:19,890 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-04-15 05:15:20,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:20,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:20,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:20,183 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:15:20,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 49 [2021-04-15 05:15:20,215 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:20,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:20,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:20,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:20,312 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-04-15 05:15:20,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-04-15 05:15:20,317 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:20,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:20,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:20,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:20,489 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-04-15 05:15:20,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 30 [2021-04-15 05:15:20,497 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:20,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:20,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:20,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:20,586 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-04-15 05:15:20,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-04-15 05:15:20,591 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:20,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:20,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:20,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:20,722 INFO L354 Elim1Store]: treesize reduction 19, result has 38.7 percent of original size [2021-04-15 05:15:20,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 30 [2021-04-15 05:15:20,727 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:20,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:20,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:20,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:20,865 INFO L354 Elim1Store]: treesize reduction 20, result has 35.5 percent of original size [2021-04-15 05:15:20,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 26 [2021-04-15 05:15:20,873 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:20,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:20,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:20,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:21,024 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:15:21,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 43 [2021-04-15 05:15:21,059 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:21,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:21,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:21,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:21,201 INFO L354 Elim1Store]: treesize reduction 19, result has 38.7 percent of original size [2021-04-15 05:15:21,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 30 [2021-04-15 05:15:21,206 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:21,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:21,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:21,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:21,300 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-04-15 05:15:21,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-04-15 05:15:21,305 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:21,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:21,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:21,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:21,395 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-04-15 05:15:21,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-04-15 05:15:21,400 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:21,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:21,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:21,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:21,486 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-04-15 05:15:21,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-04-15 05:15:21,490 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:21,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:21,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:21,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:21,574 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-04-15 05:15:21,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-04-15 05:15:21,579 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:21,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:21,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:21,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:21,709 INFO L354 Elim1Store]: treesize reduction 19, result has 38.7 percent of original size [2021-04-15 05:15:21,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 27 [2021-04-15 05:15:21,717 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:21,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:21,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:21,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:21,794 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-04-15 05:15:21,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-04-15 05:15:21,798 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:21,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:21,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:21,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:21,935 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-04-15 05:15:21,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 30 [2021-04-15 05:15:21,944 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:21,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:21,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:21,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:22,044 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-04-15 05:15:22,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 23 [2021-04-15 05:15:22,050 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:22,527 WARN L205 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 22 [2021-04-15 05:15:22,528 INFO L628 ElimStorePlain]: treesize reduction 134, result has 37.7 percent of original size [2021-04-15 05:15:22,531 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-04-15 05:15:22,531 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:753, output treesize:81 [2021-04-15 05:15:22,801 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2021-04-15 05:15:22,965 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:22,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:15:22,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-04-15 05:15:22,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116406019] [2021-04-15 05:15:22,965 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:15:22,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:15:22,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:15:22,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:15:22,966 INFO L87 Difference]: Start difference. First operand 2076 states and 7062 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:23,313 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 24 [2021-04-15 05:15:23,520 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-04-15 05:15:24,084 WARN L205 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2021-04-15 05:15:24,477 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-04-15 05:15:24,732 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-04-15 05:15:25,337 WARN L205 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2021-04-15 05:15:25,766 WARN L205 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2021-04-15 05:15:26,839 WARN L205 SmtUtils]: Spent 603.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 40 [2021-04-15 05:15:27,250 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-04-15 05:15:27,557 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2021-04-15 05:15:28,202 WARN L205 SmtUtils]: Spent 569.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2021-04-15 05:15:28,568 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2021-04-15 05:15:29,333 WARN L205 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-04-15 05:15:30,046 WARN L205 SmtUtils]: Spent 551.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2021-04-15 05:15:30,661 WARN L205 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2021-04-15 05:15:30,972 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-04-15 05:15:32,106 WARN L205 SmtUtils]: Spent 843.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2021-04-15 05:15:32,968 WARN L205 SmtUtils]: Spent 759.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2021-04-15 05:15:33,850 WARN L205 SmtUtils]: Spent 779.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2021-04-15 05:15:34,639 WARN L205 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2021-04-15 05:15:35,917 WARN L205 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 81 DAG size of output: 71 [2021-04-15 05:15:37,178 WARN L205 SmtUtils]: Spent 1.00 s on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2021-04-15 05:15:37,922 WARN L205 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-04-15 05:15:39,203 WARN L205 SmtUtils]: Spent 876.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2021-04-15 05:15:39,482 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 18 [2021-04-15 05:15:40,105 WARN L205 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 27 [2021-04-15 05:15:41,038 WARN L205 SmtUtils]: Spent 852.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-04-15 05:15:41,805 WARN L205 SmtUtils]: Spent 584.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2021-04-15 05:15:42,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:15:42,050 INFO L93 Difference]: Finished difference Result 3116 states and 9915 transitions. [2021-04-15 05:15:42,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-04-15 05:15:42,055 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:15:42,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:15:42,060 INFO L225 Difference]: With dead ends: 3116 [2021-04-15 05:15:42,060 INFO L226 Difference]: Without dead ends: 3072 [2021-04-15 05:15:42,060 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 18079.3ms TimeCoverageRelationStatistics Valid=488, Invalid=1768, Unknown=0, NotChecked=0, Total=2256 [2021-04-15 05:15:42,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3072 states. [2021-04-15 05:15:42,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3072 to 2087. [2021-04-15 05:15:42,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2087 states, 2086 states have (on average 3.399808245445829) internal successors, (7092), 2086 states have internal predecessors, (7092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:42,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2087 states to 2087 states and 7092 transitions. [2021-04-15 05:15:42,094 INFO L78 Accepts]: Start accepts. Automaton has 2087 states and 7092 transitions. Word has length 26 [2021-04-15 05:15:42,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:15:42,094 INFO L480 AbstractCegarLoop]: Abstraction has 2087 states and 7092 transitions. [2021-04-15 05:15:42,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:42,094 INFO L276 IsEmpty]: Start isEmpty. Operand 2087 states and 7092 transitions. [2021-04-15 05:15:42,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:15:42,096 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:15:42,096 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:15:42,296 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3048,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:15:42,297 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:15:42,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:15:42,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1345416738, now seen corresponding path program 46 times [2021-04-15 05:15:42,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:15:42,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787417973] [2021-04-15 05:15:42,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:15:42,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:15:42,588 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2021-04-15 05:15:42,821 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2021-04-15 05:15:43,244 WARN L205 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2021-04-15 05:15:43,645 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-04-15 05:15:43,984 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-04-15 05:15:44,340 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-04-15 05:15:44,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:44,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787417973] [2021-04-15 05:15:44,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278045344] [2021-04-15 05:15:44,477 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:15:44,500 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:15:44,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:15:44,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 05:15:44,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:15:44,982 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-04-15 05:15:45,379 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-04-15 05:15:46,184 WARN L205 SmtUtils]: Spent 620.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-04-15 05:15:47,376 WARN L205 SmtUtils]: Spent 917.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 54 [2021-04-15 05:15:47,642 INFO L446 ElimStorePlain]: Different costs {1=[A], 2=[v_prenex_371, v_prenex_372]} [2021-04-15 05:15:47,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:15:47,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-04-15 05:15:47,661 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. Received shutdown request... [2021-04-15 05:15:47,996 WARN L222 SmtUtils]: Removed 2 from assertion stack [2021-04-15 05:15:48,197 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3078 [2021-04-15 05:15:48,197 WARN L545 AbstractCegarLoop]: Verification canceled [2021-04-15 05:15:48,200 WARN L224 ceAbstractionStarter]: Timeout [2021-04-15 05:15:48,200 INFO L202 PluginConnector]: Adding new model max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.04 05:15:48 BasicIcfg [2021-04-15 05:15:48,200 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-15 05:15:48,200 INFO L168 Benchmark]: Toolchain (without parser) took 808946.97 ms. Allocated memory was 354.4 MB in the beginning and 677.4 MB in the end (delta: 323.0 MB). Free memory was 334.7 MB in the beginning and 398.5 MB in the end (delta: -63.8 MB). Peak memory consumption was 261.8 MB. Max. memory is 16.0 GB. [2021-04-15 05:15:48,201 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.15 ms. Allocated memory is still 354.4 MB. Free memory was 335.9 MB in the beginning and 335.8 MB in the end (delta: 75.1 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 05:15:48,201 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.46 ms. Allocated memory is still 354.4 MB. Free memory was 334.6 MB in the beginning and 333.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-04-15 05:15:48,201 INFO L168 Benchmark]: Boogie Preprocessor took 14.20 ms. Allocated memory is still 354.4 MB. Free memory was 333.2 MB in the beginning and 332.2 MB in the end (delta: 994.1 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 05:15:48,201 INFO L168 Benchmark]: RCFGBuilder took 333.65 ms. Allocated memory is still 354.4 MB. Free memory was 332.1 MB in the beginning and 319.2 MB in the end (delta: 12.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-04-15 05:15:48,201 INFO L168 Benchmark]: TraceAbstraction took 808568.92 ms. Allocated memory was 354.4 MB in the beginning and 677.4 MB in the end (delta: 323.0 MB). Free memory was 318.8 MB in the beginning and 398.5 MB in the end (delta: -79.7 MB). Peak memory consumption was 245.0 MB. Max. memory is 16.0 GB. [2021-04-15 05:15:48,201 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 0.15 ms. Allocated memory is still 354.4 MB. Free memory was 335.9 MB in the beginning and 335.8 MB in the end (delta: 75.1 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 25.46 ms. Allocated memory is still 354.4 MB. Free memory was 334.6 MB in the beginning and 333.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 14.20 ms. Allocated memory is still 354.4 MB. Free memory was 333.2 MB in the beginning and 332.2 MB in the end (delta: 994.1 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 333.65 ms. Allocated memory is still 354.4 MB. Free memory was 332.1 MB in the beginning and 319.2 MB in the end (delta: 12.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 808568.92 ms. Allocated memory was 354.4 MB in the beginning and 677.4 MB in the end (delta: 323.0 MB). Free memory was 318.8 MB in the beginning and 398.5 MB in the end (delta: -79.7 MB). Peak memory consumption was 245.0 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 66]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 66). Cancelled while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations,while SimplifyDDAWithTimeout was simplifying term of DAG size 48 for 333ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 808475.3ms, OverallIterations: 111, TraceHistogramMax: 2, EmptinessCheckTime: 246.4ms, AutomataDifference: 468647.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 58.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4438 SDtfs, 22491 SDslu, 33092 SDs, 0 SdLazy, 61237 SolverSat, 3652 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 56329.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5806 GetRequests, 2007 SyntacticMatches, 111 SemanticMatches, 3688 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42607 ImplicationChecksByTransitivity, 519871.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2087occurred in iteration=110, InterpolantAutomatonStates: 2820, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 2549.6ms AutomataMinimizationTime, 110 MinimizatonAttempts, 75922 StatesRemovedByMinimization, 110 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 390.8ms SsaConstructionTime, 1514.6ms SatisfiabilityAnalysisTime, 304964.6ms InterpolantComputationTime, 5454 NumberOfCodeBlocks, 5454 NumberOfCodeBlocksAsserted, 346 NumberOfCheckSat, 5237 ConstructedInterpolants, 100 QuantifiedInterpolants, 165317 SizeOfPredicates, 607 NumberOfNonLiveVariables, 7066 ConjunctsInSsa, 2169 ConjunctsInUnsatCore, 217 InterpolantComputations, 3 PerfectInterpolantSequences, 107/1282 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