/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-array-hom.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 23:54:52,518 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 23:54:52,519 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 23:54:52,545 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-10 23:54:52,546 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-10 23:54:52,548 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-10 23:54:52,549 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-10 23:54:52,553 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-10 23:54:52,555 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-10 23:54:52,558 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-10 23:54:52,558 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-10 23:54:52,559 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-10 23:54:52,559 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-10 23:54:52,560 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-10 23:54:52,561 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-10 23:54:52,562 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-10 23:54:52,564 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-10 23:54:52,565 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-10 23:54:52,566 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-10 23:54:52,573 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-10 23:54:52,574 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-10 23:54:52,575 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-10 23:54:52,576 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-10 23:54:52,577 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-10 23:54:52,580 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-03-10 23:54:52,581 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-03-10 23:54:52,581 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-03-10 23:54:52,581 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-03-10 23:54:52,581 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-03-10 23:54:52,582 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-03-10 23:54:52,582 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-03-10 23:54:52,582 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-03-10 23:54:52,583 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-03-10 23:54:52,583 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-03-10 23:54:52,584 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-03-10 23:54:52,584 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-03-10 23:54:52,584 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-03-10 23:54:52,585 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-03-10 23:54:52,585 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-10 23:54:52,585 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-10 23:54:52,586 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-10 23:54:52,591 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 [2021-03-10 23:54:52,616 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 23:54:52,617 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 23:54:52,617 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 23:54:52,617 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 23:54:52,619 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 23:54:52,619 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 23:54:52,620 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 23:54:52,620 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 23:54:52,620 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 23:54:52,620 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 23:54:52,621 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 23:54:52,621 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 23:54:52,621 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 23:54:52,621 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 23:54:52,621 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 23:54:52,621 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 23:54:52,621 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 23:54:52,621 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 23:54:52,621 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 23:54:52,622 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 23:54:52,622 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 23:54:52,622 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 23:54:52,622 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 23:54:52,622 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 23:54:52,622 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 23:54:52,622 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 23:54:52,622 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 23:54:52,622 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 23:54:52,622 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 23:54:52,623 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 23:54:52,623 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 23:54:52,623 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 23:54:52,831 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 23:54:52,846 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 23:54:52,848 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 23:54:52,849 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-10 23:54:52,850 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-10 23:54:52,850 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-array-hom.wvr.bpl [2021-03-10 23:54:52,850 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-array-hom.wvr.bpl' [2021-03-10 23:54:52,886 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 23:54:52,890 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-10 23:54:52,890 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 23:54:52,891 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 23:54:52,891 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 23:54:52,901 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:54:52" (1/1) ... [2021-03-10 23:54:52,906 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:54:52" (1/1) ... [2021-03-10 23:54:52,910 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 23:54:52,911 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 23:54:52,911 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 23:54:52,911 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 23:54:52,916 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:54:52" (1/1) ... [2021-03-10 23:54:52,916 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:54:52" (1/1) ... [2021-03-10 23:54:52,917 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:54:52" (1/1) ... [2021-03-10 23:54:52,917 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:54:52" (1/1) ... [2021-03-10 23:54:52,918 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:54:52" (1/1) ... [2021-03-10 23:54:52,920 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:54:52" (1/1) ... [2021-03-10 23:54:52,921 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:54:52" (1/1) ... [2021-03-10 23:54:52,924 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 23:54:52,925 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 23:54:52,925 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 23:54:52,925 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 23:54:52,937 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:54:52" (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 [2021-03-10 23:54:52,981 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-10 23:54:52,981 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-10 23:54:52,981 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-10 23:54:52,981 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-10 23:54:52,981 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-10 23:54:52,981 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-10 23:54:52,981 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-10 23:54:52,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 23:54:52,981 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 23:54:52,981 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-03-10 23:54:52,981 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-03-10 23:54:52,982 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-03-10 23:54:52,982 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-10 23:54:53,109 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 23:54:53,109 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-10 23:54:53,110 INFO L202 PluginConnector]: Adding new model max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 11:54:53 BoogieIcfgContainer [2021-03-10 23:54:53,110 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 23:54:53,111 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 23:54:53,111 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 23:54:53,113 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 23:54:53,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:54:52" (1/2) ... [2021-03-10 23:54:53,114 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@651c33ab and model type max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 11:54:53, skipping insertion in model container [2021-03-10 23:54:53,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 11:54:53" (2/2) ... [2021-03-10 23:54:53,115 INFO L111 eAbstractionObserver]: Analyzing ICFG max-array-hom.wvr.bpl [2021-03-10 23:54:53,118 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 23:54:53,118 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 23:54:53,120 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-10 23:54:53,121 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 23:54:53,143 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-03-10 23:54:53,153 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-10 23:54:53,164 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 23:54:53,164 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 23:54:53,164 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 23:54:53,164 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 23:54:53,164 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 23:54:53,165 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 23:54:53,165 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 23:54:53,165 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 23:54:53,170 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-03-10 23:54:53,184 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) [2021-03-10 23:54:53,186 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) [2021-03-10 23:54:53,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 23:54:53,191 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:54:53,192 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:54:53,192 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:54:53,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:54:53,195 INFO L82 PathProgramCache]: Analyzing trace with hash -986458276, now seen corresponding path program 1 times [2021-03-10 23:54:53,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:54:53,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771934973] [2021-03-10 23:54:53,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:54:53,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:54:53,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:54:53,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771934973] [2021-03-10 23:54:53,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 23:54:53,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 23:54:53,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20905991] [2021-03-10 23:54:53,333 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-10 23:54:53,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:54:53,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-10 23:54:53,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 23:54:53,352 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) [2021-03-10 23:54:53,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:54:53,396 INFO L93 Difference]: Finished difference Result 217 states and 617 transitions. [2021-03-10 23:54:53,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-10 23:54:53,397 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 [2021-03-10 23:54:53,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:54:53,411 INFO L225 Difference]: With dead ends: 217 [2021-03-10 23:54:53,411 INFO L226 Difference]: Without dead ends: 202 [2021-03-10 23:54:53,412 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 23:54:53,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-03-10 23:54:53,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2021-03-10 23:54:53,465 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) [2021-03-10 23:54:53,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 419 transitions. [2021-03-10 23:54:53,467 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 419 transitions. Word has length 18 [2021-03-10 23:54:53,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:54:53,468 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 419 transitions. [2021-03-10 23:54:53,468 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) [2021-03-10 23:54:53,468 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 419 transitions. [2021-03-10 23:54:53,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 23:54:53,469 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:54:53,469 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:54:53,469 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-10 23:54:53,470 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:54:53,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:54:53,471 INFO L82 PathProgramCache]: Analyzing trace with hash -433058596, now seen corresponding path program 1 times [2021-03-10 23:54:53,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:54:53,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120045300] [2021-03-10 23:54:53,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:54:53,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:54:53,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:54:53,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120045300] [2021-03-10 23:54:53,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 23:54:53,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 23:54:53,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8297444] [2021-03-10 23:54:53,533 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 23:54:53,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:54:53,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 23:54:53,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 23:54:53,537 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) [2021-03-10 23:54:53,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:54:53,580 INFO L93 Difference]: Finished difference Result 158 states and 445 transitions. [2021-03-10 23:54:53,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 23:54:53,580 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 [2021-03-10 23:54:53,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:54:53,583 INFO L225 Difference]: With dead ends: 158 [2021-03-10 23:54:53,583 INFO L226 Difference]: Without dead ends: 158 [2021-03-10 23:54:53,584 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 23:54:53,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-03-10 23:54:53,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2021-03-10 23:54:53,593 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) [2021-03-10 23:54:53,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-03-10 23:54:53,593 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 20 [2021-03-10 23:54:53,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:54:53,594 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-03-10 23:54:53,594 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) [2021-03-10 23:54:53,594 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-03-10 23:54:53,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 23:54:53,595 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:54:53,595 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:54:53,595 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-10 23:54:53,595 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:54:53,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:54:53,596 INFO L82 PathProgramCache]: Analyzing trace with hash 275548602, now seen corresponding path program 1 times [2021-03-10 23:54:53,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:54:53,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074894748] [2021-03-10 23:54:53,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:54:53,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:54:53,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:54:53,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074894748] [2021-03-10 23:54:53,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 23:54:53,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 23:54:53,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483391157] [2021-03-10 23:54:53,641 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 23:54:53,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:54:53,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 23:54:53,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-10 23:54:53,646 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) [2021-03-10 23:54:53,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:54:53,691 INFO L93 Difference]: Finished difference Result 183 states and 522 transitions. [2021-03-10 23:54:53,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 23:54:53,692 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 [2021-03-10 23:54:53,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:54:53,694 INFO L225 Difference]: With dead ends: 183 [2021-03-10 23:54:53,694 INFO L226 Difference]: Without dead ends: 183 [2021-03-10 23:54:53,695 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-03-10 23:54:53,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-03-10 23:54:53,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2021-03-10 23:54:53,707 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) [2021-03-10 23:54:53,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-03-10 23:54:53,708 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-03-10 23:54:53,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:54:53,708 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-03-10 23:54:53,708 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) [2021-03-10 23:54:53,708 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-03-10 23:54:53,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 23:54:53,709 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:54:53,709 INFO L519 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] [2021-03-10 23:54:53,709 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-10 23:54:53,710 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:54:53,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:54:53,710 INFO L82 PathProgramCache]: Analyzing trace with hash -483303622, now seen corresponding path program 1 times [2021-03-10 23:54:53,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:54:53,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36013726] [2021-03-10 23:54:53,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:54:53,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:54:54,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:54:54,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36013726] [2021-03-10 23:54:54,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344024327] [2021-03-10 23:54:54,050 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 [2021-03-10 23:54:54,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:54:54,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 23:54:54,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:54:54,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-10 23:54:54,415 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:54:54,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-03-10 23:54:54,422 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:54:54,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-03-10 23:54:54,427 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:54:54,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:54:54,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:54:54,442 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:103, output treesize:21 [2021-03-10 23:54:54,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:54:54,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:54:54,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-10 23:54:54,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760137213] [2021-03-10 23:54:54,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 23:54:54,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:54:54,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 23:54:54,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-03-10 23:54:54,493 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) [2021-03-10 23:54:54,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:54:54,745 INFO L93 Difference]: Finished difference Result 330 states and 935 transitions. [2021-03-10 23:54:54,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 23:54:54,746 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 [2021-03-10 23:54:54,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:54:54,748 INFO L225 Difference]: With dead ends: 330 [2021-03-10 23:54:54,748 INFO L226 Difference]: Without dead ends: 315 [2021-03-10 23:54:54,749 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 426.7ms TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-03-10 23:54:54,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-03-10 23:54:54,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 224. [2021-03-10 23:54:54,758 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) [2021-03-10 23:54:54,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-03-10 23:54:54,759 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-03-10 23:54:54,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:54:54,759 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-03-10 23:54:54,760 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) [2021-03-10 23:54:54,760 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-03-10 23:54:54,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 23:54:54,764 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:54:54,765 INFO L519 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] [2021-03-10 23:54:54,981 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:54:54,982 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:54:54,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:54:54,982 INFO L82 PathProgramCache]: Analyzing trace with hash -651112714, now seen corresponding path program 2 times [2021-03-10 23:54:54,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:54:54,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856900827] [2021-03-10 23:54:54,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:54:54,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:54:55,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:54:55,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856900827] [2021-03-10 23:54:55,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822689799] [2021-03-10 23:54:55,189 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) [2021-03-10 23:54:55,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:54:55,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:54:55,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 23:54:55,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:54:55,476 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-10 23:54:55,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-03-10 23:54:55,486 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:54:55,505 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-10 23:54:55,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-03-10 23:54:55,508 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:54:55,518 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:54:55,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-03-10 23:54:55,535 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:54:55,544 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:54:55,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-03-10 23:54:55,546 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 23:54:55,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:54:55,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 23:54:55,600 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:125, output treesize:83 [2021-03-10 23:54:55,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:54:55,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:54:55,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-03-10 23:54:55,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831032606] [2021-03-10 23:54:55,724 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 23:54:55,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:54:55,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 23:54:55,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-03-10 23:54:55,725 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) [2021-03-10 23:54:56,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:54:56,155 INFO L93 Difference]: Finished difference Result 374 states and 1077 transitions. [2021-03-10 23:54:56,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 23:54:56,156 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 [2021-03-10 23:54:56,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:54:56,158 INFO L225 Difference]: With dead ends: 374 [2021-03-10 23:54:56,158 INFO L226 Difference]: Without dead ends: 359 [2021-03-10 23:54:56,159 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 562.4ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-03-10 23:54:56,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-03-10 23:54:56,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 229. [2021-03-10 23:54:56,165 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) [2021-03-10 23:54:56,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-03-10 23:54:56,166 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-03-10 23:54:56,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:54:56,166 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-03-10 23:54:56,166 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) [2021-03-10 23:54:56,166 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-03-10 23:54:56,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 23:54:56,167 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:54:56,167 INFO L519 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] [2021-03-10 23:54:56,384 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:54:56,384 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:54:56,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:54:56,384 INFO L82 PathProgramCache]: Analyzing trace with hash -352339266, now seen corresponding path program 3 times [2021-03-10 23:54:56,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:54:56,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677011813] [2021-03-10 23:54:56,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:54:56,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:54:56,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:54:56,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677011813] [2021-03-10 23:54:56,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091741785] [2021-03-10 23:54:56,551 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 [2021-03-10 23:54:56,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 23:54:56,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:54:56,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 23:54:56,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:54:56,695 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 23:54:56,696 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:54:56,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-03-10 23:54:56,703 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:54:56,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-03-10 23:54:56,706 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:54:56,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-03-10 23:54:56,709 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 23:54:56,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-03-10 23:54:56,712 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 23:54:56,718 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 21 treesize of output 13 [2021-03-10 23:54:56,720 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 23:54:56,740 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-03-10 23:54:56,741 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:54:56,741 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:145, output treesize:21 [2021-03-10 23:54:56,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:54:56,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:54:56,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 23:54:56,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524764411] [2021-03-10 23:54:56,778 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 23:54:56,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:54:56,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 23:54:56,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-03-10 23:54:56,779 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) [2021-03-10 23:54:56,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:54:56,932 INFO L93 Difference]: Finished difference Result 296 states and 831 transitions. [2021-03-10 23:54:56,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 23:54:56,933 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 [2021-03-10 23:54:56,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:54:56,934 INFO L225 Difference]: With dead ends: 296 [2021-03-10 23:54:56,934 INFO L226 Difference]: Without dead ends: 281 [2021-03-10 23:54:56,935 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 239.6ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:54:56,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-03-10 23:54:56,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 241. [2021-03-10 23:54:56,939 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) [2021-03-10 23:54:56,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-03-10 23:54:56,940 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-03-10 23:54:56,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:54:56,941 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-03-10 23:54:56,941 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) [2021-03-10 23:54:56,941 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-03-10 23:54:56,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 23:54:56,941 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:54:56,941 INFO L519 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] [2021-03-10 23:54:57,161 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-03-10 23:54:57,161 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:54:57,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:54:57,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1218486334, now seen corresponding path program 4 times [2021-03-10 23:54:57,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:54:57,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063136275] [2021-03-10 23:54:57,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:54:57,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:54:57,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:54:57,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063136275] [2021-03-10 23:54:57,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073650207] [2021-03-10 23:54:57,343 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) [2021-03-10 23:54:57,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:54:57,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:54:57,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:54:57,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:54:57,540 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:54:57,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-03-10 23:54:57,546 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:54:57,569 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-10 23:54:57,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-03-10 23:54:57,572 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:54:57,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:54:57,631 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:54:57,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-03-10 23:54:57,634 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:54:57,642 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-10 23:54:57,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-03-10 23:54:57,643 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 23:54:57,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:54:57,708 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 23:54:57,708 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:83 [2021-03-10 23:54:57,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:54:57,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:54:57,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 23:54:57,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325836632] [2021-03-10 23:54:57,831 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 23:54:57,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:54:57,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 23:54:57,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:54:57,832 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) [2021-03-10 23:54:58,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:54:58,173 INFO L93 Difference]: Finished difference Result 425 states and 1233 transitions. [2021-03-10 23:54:58,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 23:54:58,173 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 [2021-03-10 23:54:58,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:54:58,175 INFO L225 Difference]: With dead ends: 425 [2021-03-10 23:54:58,175 INFO L226 Difference]: Without dead ends: 410 [2021-03-10 23:54:58,176 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 456.3ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-03-10 23:54:58,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-03-10 23:54:58,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 247. [2021-03-10 23:54:58,182 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) [2021-03-10 23:54:58,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-03-10 23:54:58,183 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-03-10 23:54:58,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:54:58,184 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-03-10 23:54:58,184 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) [2021-03-10 23:54:58,185 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-03-10 23:54:58,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:54:58,185 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:54:58,186 INFO L519 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] [2021-03-10 23:54:58,395 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:54:58,395 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:54:58,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:54:58,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1613936552, now seen corresponding path program 5 times [2021-03-10 23:54:58,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:54:58,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780191105] [2021-03-10 23:54:58,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:54:58,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:54:58,435 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:54:58,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780191105] [2021-03-10 23:54:58,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331606249] [2021-03-10 23:54:58,436 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 [2021-03-10 23:54:58,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 23:54:58,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:54:58,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:54:58,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:54:58,525 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:54:58,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:54:58,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 23:54:58,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112104692] [2021-03-10 23:54:58,528 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 23:54:58,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:54:58,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 23:54:58,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-10 23:54:58,529 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) [2021-03-10 23:54:58,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:54:58,895 INFO L93 Difference]: Finished difference Result 619 states and 1783 transitions. [2021-03-10 23:54:58,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 23:54:58,895 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 [2021-03-10 23:54:58,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:54:58,897 INFO L225 Difference]: With dead ends: 619 [2021-03-10 23:54:58,897 INFO L226 Difference]: Without dead ends: 619 [2021-03-10 23:54:58,898 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 206.4ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-03-10 23:54:58,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-03-10 23:54:58,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-03-10 23:54:58,904 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) [2021-03-10 23:54:58,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-03-10 23:54:58,905 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-03-10 23:54:58,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:54:58,906 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-03-10 23:54:58,906 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) [2021-03-10 23:54:58,906 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-03-10 23:54:58,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:54:58,907 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:54:58,907 INFO L519 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] [2021-03-10 23:54:59,114 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-03-10 23:54:59,115 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:54:59,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:54:59,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1704711900, now seen corresponding path program 6 times [2021-03-10 23:54:59,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:54:59,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952862498] [2021-03-10 23:54:59,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:54:59,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:54:59,146 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:54:59,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952862498] [2021-03-10 23:54:59,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385596865] [2021-03-10 23:54:59,146 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 [2021-03-10 23:54:59,166 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:54:59,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:54:59,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:54:59,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:54:59,258 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:54:59,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:54:59,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-10 23:54:59,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509377256] [2021-03-10 23:54:59,258 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 23:54:59,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:54:59,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 23:54:59,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:54:59,259 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) [2021-03-10 23:54:59,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:54:59,946 INFO L93 Difference]: Finished difference Result 1078 states and 2992 transitions. [2021-03-10 23:54:59,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-03-10 23:54:59,947 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 [2021-03-10 23:54:59,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:54:59,950 INFO L225 Difference]: With dead ends: 1078 [2021-03-10 23:54:59,950 INFO L226 Difference]: Without dead ends: 1078 [2021-03-10 23:54:59,951 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 400.1ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 23:54:59,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-03-10 23:54:59,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-03-10 23:54:59,960 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) [2021-03-10 23:54:59,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-03-10 23:54:59,961 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-03-10 23:54:59,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:54:59,961 INFO L480 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-03-10 23:54:59,961 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) [2021-03-10 23:54:59,961 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-03-10 23:54:59,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:54:59,962 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:54:59,963 INFO L519 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] [2021-03-10 23:55:00,175 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:55:00,176 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:55:00,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:55:00,176 INFO L82 PathProgramCache]: Analyzing trace with hash -2023303316, now seen corresponding path program 7 times [2021-03-10 23:55:00,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:55:00,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903357576] [2021-03-10 23:55:00,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:55:00,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:55:00,226 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:00,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903357576] [2021-03-10 23:55:00,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218587058] [2021-03-10 23:55:00,227 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 [2021-03-10 23:55:00,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:55:00,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:55:00,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:55:00,327 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:00,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:55:00,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-10 23:55:00,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521494312] [2021-03-10 23:55:00,328 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 23:55:00,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:55:00,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 23:55:00,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:55:00,328 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) [2021-03-10 23:55:00,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:55:00,945 INFO L93 Difference]: Finished difference Result 951 states and 2692 transitions. [2021-03-10 23:55:00,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-10 23:55:00,946 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 [2021-03-10 23:55:00,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:55:00,949 INFO L225 Difference]: With dead ends: 951 [2021-03-10 23:55:00,949 INFO L226 Difference]: Without dead ends: 951 [2021-03-10 23:55:00,950 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 363.3ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-03-10 23:55:00,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-03-10 23:55:00,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-03-10 23:55:00,969 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) [2021-03-10 23:55:00,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-03-10 23:55:00,970 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-03-10 23:55:00,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:55:00,970 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-03-10 23:55:00,970 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) [2021-03-10 23:55:00,970 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-03-10 23:55:00,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:55:00,971 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:55:00,971 INFO L519 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] [2021-03-10 23:55:01,179 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:55:01,179 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:55:01,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:55:01,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1087164644, now seen corresponding path program 1 times [2021-03-10 23:55:01,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:55:01,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024265777] [2021-03-10 23:55:01,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:55:01,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:55:01,212 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:55:01,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024265777] [2021-03-10 23:55:01,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086613377] [2021-03-10 23:55:01,212 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 [2021-03-10 23:55:01,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:55:01,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 23:55:01,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:55:01,284 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:55:01,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:55:01,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-03-10 23:55:01,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668863425] [2021-03-10 23:55:01,284 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 23:55:01,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:55:01,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 23:55:01,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-10 23:55:01,285 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) [2021-03-10 23:55:01,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:55:01,384 INFO L93 Difference]: Finished difference Result 669 states and 1943 transitions. [2021-03-10 23:55:01,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 23:55:01,385 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 [2021-03-10 23:55:01,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:55:01,389 INFO L225 Difference]: With dead ends: 669 [2021-03-10 23:55:01,389 INFO L226 Difference]: Without dead ends: 663 [2021-03-10 23:55:01,389 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 52.4ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:55:01,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-03-10 23:55:01,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-03-10 23:55:01,400 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) [2021-03-10 23:55:01,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-03-10 23:55:01,401 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-03-10 23:55:01,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:55:01,401 INFO L480 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-03-10 23:55:01,401 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) [2021-03-10 23:55:01,401 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-03-10 23:55:01,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:55:01,402 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:55:01,402 INFO L519 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] [2021-03-10 23:55:01,607 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-03-10 23:55:01,607 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:55:01,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:55:01,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1524133352, now seen corresponding path program 8 times [2021-03-10 23:55:01,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:55:01,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746650309] [2021-03-10 23:55:01,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:55:01,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:55:01,650 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:01,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746650309] [2021-03-10 23:55:01,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661645529] [2021-03-10 23:55:01,650 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 [2021-03-10 23:55:01,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:55:01,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:55:01,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:55:01,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:55:01,810 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:01,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:55:01,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-10 23:55:01,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971018422] [2021-03-10 23:55:01,811 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 23:55:01,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:55:01,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 23:55:01,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:55:01,812 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) [2021-03-10 23:55:01,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:55:02,000 INFO L93 Difference]: Finished difference Result 710 states and 2124 transitions. [2021-03-10 23:55:02,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 23:55:02,000 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 [2021-03-10 23:55:02,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:55:02,003 INFO L225 Difference]: With dead ends: 710 [2021-03-10 23:55:02,003 INFO L226 Difference]: Without dead ends: 672 [2021-03-10 23:55:02,003 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 184.5ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:55:02,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-03-10 23:55:02,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-03-10 23:55:02,014 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) [2021-03-10 23:55:02,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-03-10 23:55:02,016 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-03-10 23:55:02,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:55:02,016 INFO L480 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-03-10 23:55:02,016 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) [2021-03-10 23:55:02,016 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-03-10 23:55:02,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:55:02,017 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:55:02,018 INFO L519 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] [2021-03-10 23:55:02,218 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:55:02,218 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:55:02,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:55:02,219 INFO L82 PathProgramCache]: Analyzing trace with hash 2064876612, now seen corresponding path program 2 times [2021-03-10 23:55:02,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:55:02,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421387213] [2021-03-10 23:55:02,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:55:02,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:55:02,250 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:55:02,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421387213] [2021-03-10 23:55:02,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173705439] [2021-03-10 23:55:02,250 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) [2021-03-10 23:55:02,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:55:02,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:55:02,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 23:55:02,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:55:02,326 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:55:02,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:55:02,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-03-10 23:55:02,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904801310] [2021-03-10 23:55:02,327 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 23:55:02,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:55:02,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 23:55:02,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-10 23:55:02,327 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) [2021-03-10 23:55:02,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:55:02,455 INFO L93 Difference]: Finished difference Result 830 states and 2453 transitions. [2021-03-10 23:55:02,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 23:55:02,456 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 [2021-03-10 23:55:02,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:55:02,459 INFO L225 Difference]: With dead ends: 830 [2021-03-10 23:55:02,459 INFO L226 Difference]: Without dead ends: 830 [2021-03-10 23:55:02,459 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 60.5ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:55:02,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-03-10 23:55:02,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-03-10 23:55:02,470 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) [2021-03-10 23:55:02,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-03-10 23:55:02,472 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-03-10 23:55:02,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:55:02,472 INFO L480 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-03-10 23:55:02,472 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) [2021-03-10 23:55:02,472 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-03-10 23:55:02,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:55:02,473 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:55:02,473 INFO L519 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] [2021-03-10 23:55:02,679 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-03-10 23:55:02,679 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:55:02,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:55:02,680 INFO L82 PathProgramCache]: Analyzing trace with hash 718195046, now seen corresponding path program 9 times [2021-03-10 23:55:02,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:55:02,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490320939] [2021-03-10 23:55:02,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:55:02,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:55:02,715 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:02,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490320939] [2021-03-10 23:55:02,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737611816] [2021-03-10 23:55:02,715 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 [2021-03-10 23:55:02,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:55:02,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:55:02,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:55:02,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:55:02,805 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:02,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:55:02,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-10 23:55:02,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837638963] [2021-03-10 23:55:02,806 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 23:55:02,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:55:02,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 23:55:02,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-03-10 23:55:02,807 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) [2021-03-10 23:55:03,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:55:03,080 INFO L93 Difference]: Finished difference Result 1196 states and 3492 transitions. [2021-03-10 23:55:03,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 23:55:03,080 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 [2021-03-10 23:55:03,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:55:03,085 INFO L225 Difference]: With dead ends: 1196 [2021-03-10 23:55:03,085 INFO L226 Difference]: Without dead ends: 1196 [2021-03-10 23:55:03,086 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 152.7ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-03-10 23:55:03,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-03-10 23:55:03,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-03-10 23:55:03,099 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) [2021-03-10 23:55:03,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-03-10 23:55:03,100 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-03-10 23:55:03,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:55:03,101 INFO L480 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-03-10 23:55:03,101 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) [2021-03-10 23:55:03,101 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-03-10 23:55:03,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:55:03,103 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:55:03,103 INFO L519 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] [2021-03-10 23:55:03,318 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-03-10 23:55:03,318 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:55:03,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:55:03,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1503109140, now seen corresponding path program 10 times [2021-03-10 23:55:03,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:55:03,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635432451] [2021-03-10 23:55:03,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:55:03,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:55:03,347 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:03,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635432451] [2021-03-10 23:55:03,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911843767] [2021-03-10 23:55:03,348 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 [2021-03-10 23:55:03,375 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:55:03,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:55:03,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:55:03,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:55:03,454 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:03,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:55:03,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-10 23:55:03,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868525879] [2021-03-10 23:55:03,454 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 23:55:03,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:55:03,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 23:55:03,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-03-10 23:55:03,455 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) [2021-03-10 23:55:03,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:55:03,850 INFO L93 Difference]: Finished difference Result 1492 states and 4245 transitions. [2021-03-10 23:55:03,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 23:55:03,851 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 [2021-03-10 23:55:03,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:55:03,855 INFO L225 Difference]: With dead ends: 1492 [2021-03-10 23:55:03,856 INFO L226 Difference]: Without dead ends: 1492 [2021-03-10 23:55:03,856 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 245.4ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 23:55:03,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-03-10 23:55:03,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-03-10 23:55:03,881 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) [2021-03-10 23:55:03,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-03-10 23:55:03,884 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-03-10 23:55:03,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:55:03,884 INFO L480 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-03-10 23:55:03,884 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) [2021-03-10 23:55:03,884 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-03-10 23:55:03,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:55:03,885 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:55:03,885 INFO L519 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] [2021-03-10 23:55:04,099 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-03-10 23:55:04,099 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:55:04,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:55:04,099 INFO L82 PathProgramCache]: Analyzing trace with hash 420086484, now seen corresponding path program 11 times [2021-03-10 23:55:04,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:55:04,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788278378] [2021-03-10 23:55:04,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:55:04,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:55:04,133 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:04,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788278378] [2021-03-10 23:55:04,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856450258] [2021-03-10 23:55:04,133 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 [2021-03-10 23:55:04,155 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:55:04,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:55:04,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:55:04,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:55:04,239 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:04,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:55:04,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-10 23:55:04,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357191174] [2021-03-10 23:55:04,240 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 23:55:04,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:55:04,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 23:55:04,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:55:04,241 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) [2021-03-10 23:55:04,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:55:04,461 INFO L93 Difference]: Finished difference Result 1258 states and 3765 transitions. [2021-03-10 23:55:04,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 23:55:04,471 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 [2021-03-10 23:55:04,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:55:04,484 INFO L225 Difference]: With dead ends: 1258 [2021-03-10 23:55:04,484 INFO L226 Difference]: Without dead ends: 1248 [2021-03-10 23:55:04,485 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 149.0ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-03-10 23:55:04,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-03-10 23:55:04,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-03-10 23:55:04,500 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) [2021-03-10 23:55:04,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-03-10 23:55:04,503 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-03-10 23:55:04,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:55:04,503 INFO L480 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-03-10 23:55:04,503 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) [2021-03-10 23:55:04,503 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-03-10 23:55:04,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:55:04,505 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:55:04,506 INFO L519 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] [2021-03-10 23:55:04,719 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-03-10 23:55:04,719 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:55:04,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:55:04,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1891164602, now seen corresponding path program 12 times [2021-03-10 23:55:04,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:55:04,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260984285] [2021-03-10 23:55:04,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:55:04,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:55:04,748 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:04,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260984285] [2021-03-10 23:55:04,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436896282] [2021-03-10 23:55:04,748 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 [2021-03-10 23:55:04,770 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:55:04,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:55:04,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:55:04,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:55:04,839 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:04,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:55:04,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-10 23:55:04,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030596241] [2021-03-10 23:55:04,840 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 23:55:04,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:55:04,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 23:55:04,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:55:04,840 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) [2021-03-10 23:55:05,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:55:05,070 INFO L93 Difference]: Finished difference Result 1329 states and 4025 transitions. [2021-03-10 23:55:05,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 23:55:05,071 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 [2021-03-10 23:55:05,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:55:05,075 INFO L225 Difference]: With dead ends: 1329 [2021-03-10 23:55:05,075 INFO L226 Difference]: Without dead ends: 1329 [2021-03-10 23:55:05,075 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 166.2ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-03-10 23:55:05,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-03-10 23:55:05,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-03-10 23:55:05,089 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) [2021-03-10 23:55:05,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-03-10 23:55:05,091 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-03-10 23:55:05,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:55:05,091 INFO L480 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-03-10 23:55:05,092 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) [2021-03-10 23:55:05,092 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-03-10 23:55:05,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:55:05,093 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:55:05,093 INFO L519 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] [2021-03-10 23:55:05,309 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:55:05,310 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:55:05,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:55:05,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1458287998, now seen corresponding path program 13 times [2021-03-10 23:55:05,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:55:05,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846965387] [2021-03-10 23:55:05,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:55:05,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:55:05,352 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:05,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846965387] [2021-03-10 23:55:05,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561896667] [2021-03-10 23:55:05,353 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 [2021-03-10 23:55:05,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:55:05,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:55:05,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:55:05,426 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:05,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:55:05,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-10 23:55:05,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321839210] [2021-03-10 23:55:05,426 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 23:55:05,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:55:05,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 23:55:05,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-03-10 23:55:05,427 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) [2021-03-10 23:55:05,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:55:05,733 INFO L93 Difference]: Finished difference Result 1548 states and 4638 transitions. [2021-03-10 23:55:05,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 23:55:05,734 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 [2021-03-10 23:55:05,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:55:05,740 INFO L225 Difference]: With dead ends: 1548 [2021-03-10 23:55:05,740 INFO L226 Difference]: Without dead ends: 1544 [2021-03-10 23:55:05,740 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 172.7ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:55:05,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-03-10 23:55:05,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-03-10 23:55:05,760 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) [2021-03-10 23:55:05,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-03-10 23:55:05,762 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-03-10 23:55:05,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:55:05,763 INFO L480 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-03-10 23:55:05,763 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) [2021-03-10 23:55:05,763 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-03-10 23:55:05,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:55:05,764 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:55:05,764 INFO L519 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] [2021-03-10 23:55:05,980 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:55:05,981 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:55:05,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:55:05,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1186278808, now seen corresponding path program 14 times [2021-03-10 23:55:05,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:55:05,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663525205] [2021-03-10 23:55:05,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:55:05,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:55:06,015 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:06,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663525205] [2021-03-10 23:55:06,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170508737] [2021-03-10 23:55:06,015 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) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:55:06,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:55:06,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:55:06,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:55:06,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:55:06,126 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:06,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:55:06,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-10 23:55:06,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141374910] [2021-03-10 23:55:06,127 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 23:55:06,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:55:06,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 23:55:06,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:55:06,128 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) [2021-03-10 23:55:06,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:55:06,792 INFO L93 Difference]: Finished difference Result 2734 states and 8136 transitions. [2021-03-10 23:55:06,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-10 23:55:06,792 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 [2021-03-10 23:55:06,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:55:06,801 INFO L225 Difference]: With dead ends: 2734 [2021-03-10 23:55:06,801 INFO L226 Difference]: Without dead ends: 2734 [2021-03-10 23:55:06,802 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 385.5ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 23:55:06,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-03-10 23:55:06,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-03-10 23:55:06,824 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) [2021-03-10 23:55:06,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-03-10 23:55:06,826 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-03-10 23:55:06,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:55:06,826 INFO L480 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-03-10 23:55:06,826 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) [2021-03-10 23:55:06,826 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-03-10 23:55:06,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:55:06,828 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:55:06,828 INFO L519 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] [2021-03-10 23:55:07,051 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:55:07,051 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:55:07,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:55:07,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1753230888, now seen corresponding path program 15 times [2021-03-10 23:55:07,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:55:07,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788540270] [2021-03-10 23:55:07,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:55:07,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:55:07,085 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:07,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788540270] [2021-03-10 23:55:07,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694527426] [2021-03-10 23:55:07,086 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 [2021-03-10 23:55:07,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:55:07,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:55:07,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:55:07,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:55:07,197 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:07,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:55:07,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-10 23:55:07,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771507844] [2021-03-10 23:55:07,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 23:55:07,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:55:07,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 23:55:07,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:55:07,198 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) [2021-03-10 23:55:07,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:55:07,838 INFO L93 Difference]: Finished difference Result 2693 states and 8043 transitions. [2021-03-10 23:55:07,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-10 23:55:07,838 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 [2021-03-10 23:55:07,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:55:07,844 INFO L225 Difference]: With dead ends: 2693 [2021-03-10 23:55:07,844 INFO L226 Difference]: Without dead ends: 2693 [2021-03-10 23:55:07,844 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 401.2ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 23:55:07,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-03-10 23:55:07,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-03-10 23:55:07,866 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) [2021-03-10 23:55:07,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-03-10 23:55:07,868 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-03-10 23:55:07,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:55:07,868 INFO L480 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-03-10 23:55:07,868 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) [2021-03-10 23:55:07,868 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-03-10 23:55:07,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:55:07,869 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:55:07,869 INFO L519 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] [2021-03-10 23:55:08,087 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-03-10 23:55:08,087 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:55:08,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:55:08,087 INFO L82 PathProgramCache]: Analyzing trace with hash 580885030, now seen corresponding path program 16 times [2021-03-10 23:55:08,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:55:08,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018005027] [2021-03-10 23:55:08,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:55:08,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:55:08,123 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:08,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018005027] [2021-03-10 23:55:08,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769087660] [2021-03-10 23:55:08,123 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 [2021-03-10 23:55:08,143 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:55:08,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:55:08,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:55:08,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:55:08,212 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:08,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:55:08,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 23:55:08,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624280558] [2021-03-10 23:55:08,213 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 23:55:08,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:55:08,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 23:55:08,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-03-10 23:55:08,214 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) [2021-03-10 23:55:08,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:55:08,811 INFO L93 Difference]: Finished difference Result 2677 states and 7780 transitions. [2021-03-10 23:55:08,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-03-10 23:55:08,811 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 [2021-03-10 23:55:08,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:55:08,817 INFO L225 Difference]: With dead ends: 2677 [2021-03-10 23:55:08,817 INFO L226 Difference]: Without dead ends: 2677 [2021-03-10 23:55:08,817 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 348.9ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-03-10 23:55:08,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-03-10 23:55:08,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-03-10 23:55:08,839 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) [2021-03-10 23:55:08,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-03-10 23:55:08,840 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-03-10 23:55:08,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:55:08,841 INFO L480 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-03-10 23:55:08,841 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) [2021-03-10 23:55:08,841 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-03-10 23:55:08,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:55:08,843 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:55:08,843 INFO L519 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] [2021-03-10 23:55:09,058 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-03-10 23:55:09,058 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:55:09,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:55:09,058 INFO L82 PathProgramCache]: Analyzing trace with hash 662261118, now seen corresponding path program 17 times [2021-03-10 23:55:09,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:55:09,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905777454] [2021-03-10 23:55:09,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:55:09,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:55:09,094 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:09,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905777454] [2021-03-10 23:55:09,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696393587] [2021-03-10 23:55:09,094 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 [2021-03-10 23:55:09,116 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 23:55:09,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:55:09,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:55:09,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:55:09,176 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:09,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:55:09,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 23:55:09,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898677635] [2021-03-10 23:55:09,177 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 23:55:09,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:55:09,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 23:55:09,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-03-10 23:55:09,177 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) [2021-03-10 23:55:09,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:55:09,702 INFO L93 Difference]: Finished difference Result 2474 states and 7308 transitions. [2021-03-10 23:55:09,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-10 23:55:09,703 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 [2021-03-10 23:55:09,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:55:09,707 INFO L225 Difference]: With dead ends: 2474 [2021-03-10 23:55:09,707 INFO L226 Difference]: Without dead ends: 2470 [2021-03-10 23:55:09,708 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 300.0ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 23:55:09,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-03-10 23:55:09,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-03-10 23:55:09,728 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) [2021-03-10 23:55:09,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-03-10 23:55:09,730 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-03-10 23:55:09,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:55:09,730 INFO L480 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-03-10 23:55:09,731 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) [2021-03-10 23:55:09,731 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-03-10 23:55:09,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:55:09,732 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:55:09,732 INFO L519 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] [2021-03-10 23:55:09,947 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-03-10 23:55:09,947 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:55:09,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:55:09,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1592918334, now seen corresponding path program 18 times [2021-03-10 23:55:09,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:55:09,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312888381] [2021-03-10 23:55:09,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:55:09,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:55:09,992 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:09,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312888381] [2021-03-10 23:55:09,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322114969] [2021-03-10 23:55:09,992 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 [2021-03-10 23:55:10,010 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 23:55:10,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:55:10,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:55:10,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:55:10,110 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:10,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:55:10,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-10 23:55:10,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825277493] [2021-03-10 23:55:10,110 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 23:55:10,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:55:10,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 23:55:10,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:55:10,111 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) [2021-03-10 23:55:10,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:55:10,698 INFO L93 Difference]: Finished difference Result 2514 states and 7408 transitions. [2021-03-10 23:55:10,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-03-10 23:55:10,699 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 [2021-03-10 23:55:10,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:55:10,705 INFO L225 Difference]: With dead ends: 2514 [2021-03-10 23:55:10,705 INFO L226 Difference]: Without dead ends: 2514 [2021-03-10 23:55:10,706 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 348.0ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 23:55:10,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-03-10 23:55:10,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-03-10 23:55:10,727 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) [2021-03-10 23:55:10,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-03-10 23:55:10,729 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-03-10 23:55:10,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:55:10,729 INFO L480 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-03-10 23:55:10,729 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) [2021-03-10 23:55:10,729 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-03-10 23:55:10,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:55:10,731 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:55:10,731 INFO L519 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] [2021-03-10 23:55:10,947 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-03-10 23:55:10,947 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:55:10,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:55:10,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1059009808, now seen corresponding path program 19 times [2021-03-10 23:55:10,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:55:10,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222471804] [2021-03-10 23:55:10,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:55:10,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:55:10,977 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:10,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222471804] [2021-03-10 23:55:10,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26950366] [2021-03-10 23:55:10,977 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) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:55:10,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:55:10,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:55:10,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:55:11,086 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:11,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:55:11,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-10 23:55:11,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526115092] [2021-03-10 23:55:11,086 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 23:55:11,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:55:11,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 23:55:11,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:55:11,087 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) [2021-03-10 23:55:11,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:55:11,657 INFO L93 Difference]: Finished difference Result 2332 states and 6984 transitions. [2021-03-10 23:55:11,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-10 23:55:11,658 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 [2021-03-10 23:55:11,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:55:11,662 INFO L225 Difference]: With dead ends: 2332 [2021-03-10 23:55:11,662 INFO L226 Difference]: Without dead ends: 2328 [2021-03-10 23:55:11,663 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 329.3ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 23:55:11,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-03-10 23:55:11,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-03-10 23:55:11,684 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) [2021-03-10 23:55:11,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-03-10 23:55:11,686 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-03-10 23:55:11,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:55:11,686 INFO L480 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-03-10 23:55:11,686 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) [2021-03-10 23:55:11,686 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-03-10 23:55:11,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:55:11,687 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:55:11,688 INFO L519 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] [2021-03-10 23:55:11,902 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-03-10 23:55:11,902 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:55:11,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:55:11,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1971295360, now seen corresponding path program 3 times [2021-03-10 23:55:11,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:55:11,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217499394] [2021-03-10 23:55:11,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:55:11,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:55:11,922 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:55:11,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217499394] [2021-03-10 23:55:11,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958165832] [2021-03-10 23:55:11,922 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 [2021-03-10 23:55:11,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 23:55:11,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:55:11,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 23:55:11,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:55:11,989 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:55:11,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:55:11,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-03-10 23:55:11,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507326030] [2021-03-10 23:55:11,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 23:55:11,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:55:11,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 23:55:11,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-03-10 23:55:11,990 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) [2021-03-10 23:55:12,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:55:12,058 INFO L93 Difference]: Finished difference Result 929 states and 3034 transitions. [2021-03-10 23:55:12,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 23:55:12,059 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 [2021-03-10 23:55:12,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:55:12,060 INFO L225 Difference]: With dead ends: 929 [2021-03-10 23:55:12,060 INFO L226 Difference]: Without dead ends: 929 [2021-03-10 23:55:12,061 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 46.5ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-03-10 23:55:12,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-03-10 23:55:12,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-03-10 23:55:12,082 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) [2021-03-10 23:55:12,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-03-10 23:55:12,084 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-03-10 23:55:12,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:55:12,084 INFO L480 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-03-10 23:55:12,084 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) [2021-03-10 23:55:12,084 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-03-10 23:55:12,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:55:12,087 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:55:12,087 INFO L519 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] [2021-03-10 23:55:12,301 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:55:12,302 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:55:12,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:55:12,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1041095616, now seen corresponding path program 20 times [2021-03-10 23:55:12,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:55:12,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663524122] [2021-03-10 23:55:12,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:55:12,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:55:12,329 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:12,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663524122] [2021-03-10 23:55:12,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994769104] [2021-03-10 23:55:12,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:55:12,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:55:12,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:55:12,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:55:12,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:55:12,399 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:12,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:55:12,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-03-10 23:55:12,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004631473] [2021-03-10 23:55:12,399 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 23:55:12,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:55:12,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 23:55:12,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-03-10 23:55:12,400 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) [2021-03-10 23:55:12,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:55:12,689 INFO L93 Difference]: Finished difference Result 1555 states and 4761 transitions. [2021-03-10 23:55:12,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 23:55:12,690 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 [2021-03-10 23:55:12,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:55:12,692 INFO L225 Difference]: With dead ends: 1555 [2021-03-10 23:55:12,692 INFO L226 Difference]: Without dead ends: 1555 [2021-03-10 23:55:12,692 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 154.6ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-03-10 23:55:12,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-03-10 23:55:12,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-03-10 23:55:12,705 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) [2021-03-10 23:55:12,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-03-10 23:55:12,707 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-03-10 23:55:12,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:55:12,707 INFO L480 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-03-10 23:55:12,707 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) [2021-03-10 23:55:12,707 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-03-10 23:55:12,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:55:12,709 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:55:12,709 INFO L519 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] [2021-03-10 23:55:12,923 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:55:12,923 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:55:12,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:55:12,923 INFO L82 PathProgramCache]: Analyzing trace with hash 861583836, now seen corresponding path program 21 times [2021-03-10 23:55:12,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:55:12,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950486430] [2021-03-10 23:55:12,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:55:12,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:55:12,951 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:12,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950486430] [2021-03-10 23:55:12,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931261003] [2021-03-10 23:55:12,951 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 [2021-03-10 23:55:12,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:55:12,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:55:12,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:55:12,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:55:13,018 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:13,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:55:13,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-10 23:55:13,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692335518] [2021-03-10 23:55:13,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 23:55:13,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:55:13,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 23:55:13,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-03-10 23:55:13,021 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) [2021-03-10 23:55:13,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:55:13,233 INFO L93 Difference]: Finished difference Result 1605 states and 4891 transitions. [2021-03-10 23:55:13,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 23:55:13,235 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 [2021-03-10 23:55:13,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:55:13,238 INFO L225 Difference]: With dead ends: 1605 [2021-03-10 23:55:13,238 INFO L226 Difference]: Without dead ends: 1605 [2021-03-10 23:55:13,238 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 124.1ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-03-10 23:55:13,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-03-10 23:55:13,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-03-10 23:55:13,251 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) [2021-03-10 23:55:13,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-03-10 23:55:13,253 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-03-10 23:55:13,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:55:13,253 INFO L480 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-03-10 23:55:13,253 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) [2021-03-10 23:55:13,254 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-03-10 23:55:13,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:55:13,255 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:55:13,255 INFO L519 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] [2021-03-10 23:55:13,470 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:55:13,470 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:55:13,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:55:13,470 INFO L82 PathProgramCache]: Analyzing trace with hash 816762694, now seen corresponding path program 22 times [2021-03-10 23:55:13,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:55:13,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876325107] [2021-03-10 23:55:13,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:55:13,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:55:13,509 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:55:13,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876325107] [2021-03-10 23:55:13,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135911253] [2021-03-10 23:55:13,509 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 [2021-03-10 23:55:13,529 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:55:13,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:55:13,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:55:13,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:55:13,570 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:55:13,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:55:13,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-10 23:55:13,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382162900] [2021-03-10 23:55:13,570 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 23:55:13,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:55:13,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 23:55:13,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-03-10 23:55:13,571 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) [2021-03-10 23:55:13,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:55:13,751 INFO L93 Difference]: Finished difference Result 1524 states and 4690 transitions. [2021-03-10 23:55:13,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 23:55:13,751 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 [2021-03-10 23:55:13,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:55:13,754 INFO L225 Difference]: With dead ends: 1524 [2021-03-10 23:55:13,754 INFO L226 Difference]: Without dead ends: 1520 [2021-03-10 23:55:13,754 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 102.0ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-03-10 23:55:13,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-03-10 23:55:13,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-03-10 23:55:13,789 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) [2021-03-10 23:55:13,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-03-10 23:55:13,790 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-03-10 23:55:13,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:55:13,791 INFO L480 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-03-10 23:55:13,791 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) [2021-03-10 23:55:13,791 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-03-10 23:55:13,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:55:13,792 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:55:13,792 INFO L519 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] [2021-03-10 23:55:13,992 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-03-10 23:55:13,993 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:55:13,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:55:13,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1414099352, now seen corresponding path program 23 times [2021-03-10 23:55:13,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:55:13,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633288440] [2021-03-10 23:55:13,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:55:13,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:55:14,024 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:14,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633288440] [2021-03-10 23:55:14,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907450896] [2021-03-10 23:55:14,025 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 [2021-03-10 23:55:14,042 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 23:55:14,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:55:14,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:55:14,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:55:14,111 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:14,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:55:14,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-03-10 23:55:14,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383545767] [2021-03-10 23:55:14,111 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 23:55:14,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:55:14,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 23:55:14,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-03-10 23:55:14,112 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) [2021-03-10 23:55:14,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:55:14,303 INFO L93 Difference]: Finished difference Result 1508 states and 4652 transitions. [2021-03-10 23:55:14,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 23:55:14,303 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 [2021-03-10 23:55:14,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:55:14,305 INFO L225 Difference]: With dead ends: 1508 [2021-03-10 23:55:14,305 INFO L226 Difference]: Without dead ends: 1496 [2021-03-10 23:55:14,305 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 110.4ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-03-10 23:55:14,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-03-10 23:55:14,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-03-10 23:55:14,317 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) [2021-03-10 23:55:14,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-03-10 23:55:14,319 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-03-10 23:55:14,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:55:14,319 INFO L480 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-03-10 23:55:14,319 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) [2021-03-10 23:55:14,319 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-03-10 23:55:14,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:55:14,321 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:55:14,321 INFO L519 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] [2021-03-10 23:55:14,535 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:55:14,535 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:55:14,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:55:14,535 INFO L82 PathProgramCache]: Analyzing trace with hash 887679068, now seen corresponding path program 24 times [2021-03-10 23:55:14,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:55:14,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769717026] [2021-03-10 23:55:14,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:55:14,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:55:14,566 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:14,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769717026] [2021-03-10 23:55:14,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130312081] [2021-03-10 23:55:14,566 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 [2021-03-10 23:55:14,583 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:55:14,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:55:14,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:55:14,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:55:14,670 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:14,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:55:14,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-10 23:55:14,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730773540] [2021-03-10 23:55:14,671 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 23:55:14,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:55:14,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 23:55:14,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:55:14,671 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) [2021-03-10 23:55:15,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:55:15,114 INFO L93 Difference]: Finished difference Result 2412 states and 7565 transitions. [2021-03-10 23:55:15,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 23:55:15,114 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 [2021-03-10 23:55:15,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:55:15,118 INFO L225 Difference]: With dead ends: 2412 [2021-03-10 23:55:15,118 INFO L226 Difference]: Without dead ends: 2412 [2021-03-10 23:55:15,119 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 291.2ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 23:55:15,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-03-10 23:55:15,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-03-10 23:55:15,135 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) [2021-03-10 23:55:15,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-03-10 23:55:15,137 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-03-10 23:55:15,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:55:15,137 INFO L480 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-03-10 23:55:15,137 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) [2021-03-10 23:55:15,138 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-03-10 23:55:15,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:55:15,139 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:55:15,139 INFO L519 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] [2021-03-10 23:55:15,353 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-03-10 23:55:15,354 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:55:15,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:55:15,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1454631148, now seen corresponding path program 25 times [2021-03-10 23:55:15,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:55:15,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707284587] [2021-03-10 23:55:15,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:55:15,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:55:15,393 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:15,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707284587] [2021-03-10 23:55:15,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393326925] [2021-03-10 23:55:15,394 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 [2021-03-10 23:55:15,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:55:15,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:55:15,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:55:15,489 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:15,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:55:15,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-10 23:55:15,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752171155] [2021-03-10 23:55:15,489 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 23:55:15,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:55:15,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 23:55:15,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:55:15,490 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) [2021-03-10 23:55:15,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:55:15,925 INFO L93 Difference]: Finished difference Result 2335 states and 7372 transitions. [2021-03-10 23:55:15,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 23:55:15,925 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 [2021-03-10 23:55:15,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:55:15,929 INFO L225 Difference]: With dead ends: 2335 [2021-03-10 23:55:15,929 INFO L226 Difference]: Without dead ends: 2335 [2021-03-10 23:55:15,930 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 288.4ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 23:55:15,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-03-10 23:55:15,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-03-10 23:55:15,952 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) [2021-03-10 23:55:15,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-03-10 23:55:15,954 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-03-10 23:55:15,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:55:15,954 INFO L480 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-03-10 23:55:15,954 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) [2021-03-10 23:55:15,954 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-03-10 23:55:15,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:55:15,956 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:55:15,956 INFO L519 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] [2021-03-10 23:55:16,171 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:55:16,171 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:55:16,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:55:16,171 INFO L82 PathProgramCache]: Analyzing trace with hash 282285290, now seen corresponding path program 26 times [2021-03-10 23:55:16,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:55:16,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615799563] [2021-03-10 23:55:16,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:55:16,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:55:16,211 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:16,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615799563] [2021-03-10 23:55:16,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444671596] [2021-03-10 23:55:16,212 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 [2021-03-10 23:55:16,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:55:16,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:55:16,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:55:16,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:55:16,305 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:16,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:55:16,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 23:55:16,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506898175] [2021-03-10 23:55:16,306 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 23:55:16,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:55:16,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 23:55:16,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-03-10 23:55:16,306 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) [2021-03-10 23:55:16,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:55:16,689 INFO L93 Difference]: Finished difference Result 2285 states and 7121 transitions. [2021-03-10 23:55:16,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 23:55:16,691 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 [2021-03-10 23:55:16,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:55:16,694 INFO L225 Difference]: With dead ends: 2285 [2021-03-10 23:55:16,694 INFO L226 Difference]: Without dead ends: 2285 [2021-03-10 23:55:16,694 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 254.6ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 23:55:16,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-03-10 23:55:16,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-03-10 23:55:16,711 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) [2021-03-10 23:55:16,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-03-10 23:55:16,713 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-03-10 23:55:16,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:55:16,714 INFO L480 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-03-10 23:55:16,714 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) [2021-03-10 23:55:16,714 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-03-10 23:55:16,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:55:16,715 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:55:16,715 INFO L519 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] [2021-03-10 23:55:16,921 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-03-10 23:55:16,922 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:55:16,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:55:16,922 INFO L82 PathProgramCache]: Analyzing trace with hash 363661378, now seen corresponding path program 27 times [2021-03-10 23:55:16,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:55:16,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321874598] [2021-03-10 23:55:16,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:55:16,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:55:16,951 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:16,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321874598] [2021-03-10 23:55:16,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306310496] [2021-03-10 23:55:16,951 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 [2021-03-10 23:55:16,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:55:16,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:55:16,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:55:16,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:55:17,045 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:17,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:55:17,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 23:55:17,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647585320] [2021-03-10 23:55:17,046 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 23:55:17,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:55:17,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 23:55:17,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-03-10 23:55:17,046 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) [2021-03-10 23:55:17,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:55:17,360 INFO L93 Difference]: Finished difference Result 2176 states and 6849 transitions. [2021-03-10 23:55:17,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 23:55:17,361 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 [2021-03-10 23:55:17,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:55:17,363 INFO L225 Difference]: With dead ends: 2176 [2021-03-10 23:55:17,363 INFO L226 Difference]: Without dead ends: 2172 [2021-03-10 23:55:17,363 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 194.0ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:55:17,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-03-10 23:55:17,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-03-10 23:55:17,378 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) [2021-03-10 23:55:17,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-03-10 23:55:17,380 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-03-10 23:55:17,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:55:17,380 INFO L480 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-03-10 23:55:17,380 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) [2021-03-10 23:55:17,380 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-03-10 23:55:17,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:55:17,382 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:55:17,382 INFO L519 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] [2021-03-10 23:55:17,596 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:55:17,596 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:55:17,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:55:17,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1294318594, now seen corresponding path program 28 times [2021-03-10 23:55:17,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:55:17,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684765909] [2021-03-10 23:55:17,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:55:17,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:55:17,631 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:17,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684765909] [2021-03-10 23:55:17,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80955067] [2021-03-10 23:55:17,632 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 [2021-03-10 23:55:17,651 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:55:17,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:55:17,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:55:17,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:55:17,719 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:17,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:55:17,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-10 23:55:17,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993153469] [2021-03-10 23:55:17,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 23:55:17,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:55:17,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 23:55:17,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:55:17,720 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) [2021-03-10 23:55:18,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:55:18,089 INFO L93 Difference]: Finished difference Result 2199 states and 6893 transitions. [2021-03-10 23:55:18,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 23:55:18,090 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 [2021-03-10 23:55:18,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:55:18,093 INFO L225 Difference]: With dead ends: 2199 [2021-03-10 23:55:18,093 INFO L226 Difference]: Without dead ends: 2199 [2021-03-10 23:55:18,093 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 220.4ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 23:55:18,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-03-10 23:55:18,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-03-10 23:55:18,117 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) [2021-03-10 23:55:18,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-03-10 23:55:18,121 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-03-10 23:55:18,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:55:18,121 INFO L480 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-03-10 23:55:18,121 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) [2021-03-10 23:55:18,121 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-03-10 23:55:18,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:55:18,122 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:55:18,122 INFO L519 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] [2021-03-10 23:55:18,331 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-03-10 23:55:18,331 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:55:18,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:55:18,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1357609548, now seen corresponding path program 29 times [2021-03-10 23:55:18,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:55:18,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343309664] [2021-03-10 23:55:18,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:55:18,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:55:18,360 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:18,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343309664] [2021-03-10 23:55:18,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471441597] [2021-03-10 23:55:18,361 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 [2021-03-10 23:55:18,396 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 23:55:18,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:55:18,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:55:18,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:55:18,457 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:18,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:55:18,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-10 23:55:18,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711246946] [2021-03-10 23:55:18,458 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 23:55:18,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:55:18,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 23:55:18,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:55:18,458 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) [2021-03-10 23:55:18,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:55:18,762 INFO L93 Difference]: Finished difference Result 2156 states and 6791 transitions. [2021-03-10 23:55:18,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 23:55:18,763 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 [2021-03-10 23:55:18,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:55:18,766 INFO L225 Difference]: With dead ends: 2156 [2021-03-10 23:55:18,766 INFO L226 Difference]: Without dead ends: 2152 [2021-03-10 23:55:18,766 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 195.2ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:55:18,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-03-10 23:55:18,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-03-10 23:55:18,781 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) [2021-03-10 23:55:18,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-03-10 23:55:18,783 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-03-10 23:55:18,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:55:18,783 INFO L480 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-03-10 23:55:18,783 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) [2021-03-10 23:55:18,783 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-03-10 23:55:18,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:55:18,784 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:55:18,784 INFO L519 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] [2021-03-10 23:55:18,999 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-03-10 23:55:18,999 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:55:18,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:55:18,999 INFO L82 PathProgramCache]: Analyzing trace with hash -354181564, now seen corresponding path program 30 times [2021-03-10 23:55:18,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:55:18,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329347918] [2021-03-10 23:55:18,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:55:19,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:55:19,027 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:19,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329347918] [2021-03-10 23:55:19,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739372378] [2021-03-10 23:55:19,027 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) [2021-03-10 23:55:19,055 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:55:19,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:55:19,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:55:19,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:55:19,108 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:19,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:55:19,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-10 23:55:19,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845509605] [2021-03-10 23:55:19,109 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 23:55:19,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:55:19,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 23:55:19,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-10 23:55:19,109 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) [2021-03-10 23:55:19,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:55:19,408 INFO L93 Difference]: Finished difference Result 2097 states and 6377 transitions. [2021-03-10 23:55:19,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 23:55:19,409 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 [2021-03-10 23:55:19,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:55:19,412 INFO L225 Difference]: With dead ends: 2097 [2021-03-10 23:55:19,412 INFO L226 Difference]: Without dead ends: 2097 [2021-03-10 23:55:19,412 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 184.6ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 23:55:19,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-03-10 23:55:19,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-03-10 23:55:19,440 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) [2021-03-10 23:55:19,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-03-10 23:55:19,441 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-03-10 23:55:19,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:55:19,442 INFO L480 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-03-10 23:55:19,442 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) [2021-03-10 23:55:19,442 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-03-10 23:55:19,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:55:19,444 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:55:19,444 INFO L519 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] [2021-03-10 23:55:19,649 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:55:19,649 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:55:19,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:55:19,650 INFO L82 PathProgramCache]: Analyzing trace with hash -272805476, now seen corresponding path program 31 times [2021-03-10 23:55:19,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:55:19,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380100807] [2021-03-10 23:55:19,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:55:19,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:55:19,681 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:19,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380100807] [2021-03-10 23:55:19,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470733277] [2021-03-10 23:55:19,682 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 [2021-03-10 23:55:19,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:55:19,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:55:19,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:55:19,758 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:19,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:55:19,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-10 23:55:19,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771470907] [2021-03-10 23:55:19,758 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 23:55:19,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:55:19,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 23:55:19,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-10 23:55:19,759 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) [2021-03-10 23:55:20,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:55:20,004 INFO L93 Difference]: Finished difference Result 1963 states and 6051 transitions. [2021-03-10 23:55:20,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 23:55:20,004 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 [2021-03-10 23:55:20,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:55:20,007 INFO L225 Difference]: With dead ends: 1963 [2021-03-10 23:55:20,007 INFO L226 Difference]: Without dead ends: 1959 [2021-03-10 23:55:20,007 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 143.2ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-03-10 23:55:20,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-03-10 23:55:20,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-03-10 23:55:20,023 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) [2021-03-10 23:55:20,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-03-10 23:55:20,025 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-03-10 23:55:20,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:55:20,025 INFO L480 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-03-10 23:55:20,025 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) [2021-03-10 23:55:20,025 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-03-10 23:55:20,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:55:20,027 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:55:20,027 INFO L519 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] [2021-03-10 23:55:20,242 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-03-10 23:55:20,242 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:55:20,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:55:20,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1787897448, now seen corresponding path program 32 times [2021-03-10 23:55:20,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:55:20,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987380603] [2021-03-10 23:55:20,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:55:20,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:55:20,271 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:20,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987380603] [2021-03-10 23:55:20,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442384443] [2021-03-10 23:55:20,272 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 [2021-03-10 23:55:20,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:55:20,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:55:20,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:55:20,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:55:20,337 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:20,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:55:20,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-10 23:55:20,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016202808] [2021-03-10 23:55:20,337 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 23:55:20,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:55:20,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 23:55:20,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-10 23:55:20,338 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) [2021-03-10 23:55:20,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:55:20,525 INFO L93 Difference]: Finished difference Result 1728 states and 5494 transitions. [2021-03-10 23:55:20,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 23:55:20,526 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 [2021-03-10 23:55:20,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:55:20,528 INFO L225 Difference]: With dead ends: 1728 [2021-03-10 23:55:20,528 INFO L226 Difference]: Without dead ends: 1716 [2021-03-10 23:55:20,528 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 111.2ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:55:20,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-03-10 23:55:20,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-03-10 23:55:20,541 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) [2021-03-10 23:55:20,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-03-10 23:55:20,543 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-03-10 23:55:20,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:55:20,543 INFO L480 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-03-10 23:55:20,543 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) [2021-03-10 23:55:20,543 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-03-10 23:55:20,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:55:20,544 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:55:20,544 INFO L519 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] [2021-03-10 23:55:20,759 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:55:20,759 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:55:20,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:55:20,759 INFO L82 PathProgramCache]: Analyzing trace with hash -190770732, now seen corresponding path program 33 times [2021-03-10 23:55:20,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:55:20,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927592911] [2021-03-10 23:55:20,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:55:20,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:55:20,796 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:20,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927592911] [2021-03-10 23:55:20,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826428898] [2021-03-10 23:55:20,797 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 [2021-03-10 23:55:20,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:55:20,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:55:20,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:55:20,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:55:20,883 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:20,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:55:20,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-10 23:55:20,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518336592] [2021-03-10 23:55:20,883 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 23:55:20,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:55:20,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 23:55:20,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:55:20,884 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) [2021-03-10 23:55:21,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:55:21,188 INFO L93 Difference]: Finished difference Result 1821 states and 5719 transitions. [2021-03-10 23:55:21,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 23:55:21,188 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 [2021-03-10 23:55:21,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:55:21,191 INFO L225 Difference]: With dead ends: 1821 [2021-03-10 23:55:21,191 INFO L226 Difference]: Without dead ends: 1821 [2021-03-10 23:55:21,191 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 191.1ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:55:21,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-03-10 23:55:21,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-03-10 23:55:21,207 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) [2021-03-10 23:55:21,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-03-10 23:55:21,209 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-03-10 23:55:21,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:55:21,209 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-03-10 23:55:21,209 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) [2021-03-10 23:55:21,209 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-03-10 23:55:21,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:55:21,211 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:55:21,211 INFO L519 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] [2021-03-10 23:55:21,411 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-03-10 23:55:21,411 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:55:21,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:55:21,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1452268422, now seen corresponding path program 34 times [2021-03-10 23:55:21,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:55:21,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069011372] [2021-03-10 23:55:21,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:55:21,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:55:21,442 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:21,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069011372] [2021-03-10 23:55:21,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627726440] [2021-03-10 23:55:21,443 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) [2021-03-10 23:55:21,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:55:21,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:55:21,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:55:21,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:55:21,531 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:21,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:55:21,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-10 23:55:21,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195775160] [2021-03-10 23:55:21,531 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 23:55:21,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:55:21,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 23:55:21,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:55:21,532 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) [2021-03-10 23:55:21,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:55:21,788 INFO L93 Difference]: Finished difference Result 1790 states and 5648 transitions. [2021-03-10 23:55:21,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 23:55:21,788 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 [2021-03-10 23:55:21,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:55:21,791 INFO L225 Difference]: With dead ends: 1790 [2021-03-10 23:55:21,791 INFO L226 Difference]: Without dead ends: 1786 [2021-03-10 23:55:21,791 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 163.4ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-03-10 23:55:21,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-03-10 23:55:21,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-03-10 23:55:21,808 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) [2021-03-10 23:55:21,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-03-10 23:55:21,811 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-03-10 23:55:21,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:55:21,811 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-03-10 23:55:21,811 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) [2021-03-10 23:55:21,811 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-03-10 23:55:21,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:55:21,813 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:55:21,813 INFO L519 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] [2021-03-10 23:55:22,027 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-03-10 23:55:22,027 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:55:22,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:55:22,027 INFO L82 PathProgramCache]: Analyzing trace with hash 184811244, now seen corresponding path program 35 times [2021-03-10 23:55:22,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:55:22,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832775713] [2021-03-10 23:55:22,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:55:22,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:55:22,057 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:22,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832775713] [2021-03-10 23:55:22,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239221818] [2021-03-10 23:55:22,058 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 [2021-03-10 23:55:22,087 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 23:55:22,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:55:22,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:55:22,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:55:22,140 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:22,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:55:22,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 23:55:22,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502480747] [2021-03-10 23:55:22,141 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 23:55:22,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:55:22,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 23:55:22,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-03-10 23:55:22,141 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) [2021-03-10 23:55:22,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:55:22,301 INFO L93 Difference]: Finished difference Result 1649 states and 5332 transitions. [2021-03-10 23:55:22,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 23:55:22,301 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 [2021-03-10 23:55:22,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:55:22,303 INFO L225 Difference]: With dead ends: 1649 [2021-03-10 23:55:22,303 INFO L226 Difference]: Without dead ends: 1637 [2021-03-10 23:55:22,304 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 86.2ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-03-10 23:55:22,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-03-10 23:55:22,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-03-10 23:55:22,315 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) [2021-03-10 23:55:22,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-03-10 23:55:22,317 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-03-10 23:55:22,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:55:22,317 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-03-10 23:55:22,317 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) [2021-03-10 23:55:22,318 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-03-10 23:55:22,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:55:22,319 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:55:22,319 INFO L519 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] [2021-03-10 23:55:22,519 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:55:22,520 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:55:22,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:55:22,520 INFO L82 PathProgramCache]: Analyzing trace with hash -998684486, now seen corresponding path program 4 times [2021-03-10 23:55:22,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:55:22,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765953320] [2021-03-10 23:55:22,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:55:22,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:55:22,722 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-03-10 23:55:23,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:23,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765953320] [2021-03-10 23:55:23,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675579289] [2021-03-10 23:55:23,041 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 [2021-03-10 23:55:23,061 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:55:23,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:55:23,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 23:55:23,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:55:23,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:23,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:23,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:23,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:55:23,476 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:23,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:23,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:23,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:23,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:55:23,482 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:23,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:23,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:23,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:23,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-10 23:55:23,488 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:23,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:23,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:23,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:23,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-10 23:55:23,495 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:23,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:23,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:23,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:23,500 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-10 23:55:23,502 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:23,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:23,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:23,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:23,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:55:23,510 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:23,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:23,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:23,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:23,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-10 23:55:23,517 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:23,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:23,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:23,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:23,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-10 23:55:23,527 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:23,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:23,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:23,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:23,535 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 26 treesize of output 13 [2021-03-10 23:55:23,536 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:23,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:23,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:23,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:23,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-10 23:55:23,544 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:23,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:23,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:23,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:23,550 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 33 treesize of output 19 [2021-03-10 23:55:23,551 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:23,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:23,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:23,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:23,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:55:23,558 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:23,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:23,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:23,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:23,565 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 26 treesize of output 13 [2021-03-10 23:55:23,567 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:23,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:23,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:23,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:23,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-10 23:55:23,573 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:23,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:23,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:23,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:55:23,578 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:23,648 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-03-10 23:55:23,650 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 23:55:23,650 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-03-10 23:55:23,714 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:23,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:55:23,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 23:55:23,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593610079] [2021-03-10 23:55:23,714 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 23:55:23,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:55:23,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 23:55:23,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-03-10 23:55:23,715 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) [2021-03-10 23:55:24,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:55:24,536 INFO L93 Difference]: Finished difference Result 1517 states and 4955 transitions. [2021-03-10 23:55:24,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 23:55:24,536 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 [2021-03-10 23:55:24,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:55:24,538 INFO L225 Difference]: With dead ends: 1517 [2021-03-10 23:55:24,538 INFO L226 Difference]: Without dead ends: 1502 [2021-03-10 23:55:24,538 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1170.5ms TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2021-03-10 23:55:24,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-03-10 23:55:24,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1141. [2021-03-10 23:55:24,550 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) [2021-03-10 23:55:24,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3833 transitions. [2021-03-10 23:55:24,552 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3833 transitions. Word has length 26 [2021-03-10 23:55:24,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:55:24,552 INFO L480 AbstractCegarLoop]: Abstraction has 1141 states and 3833 transitions. [2021-03-10 23:55:24,552 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) [2021-03-10 23:55:24,552 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3833 transitions. [2021-03-10 23:55:24,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:55:24,554 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:55:24,554 INFO L519 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] [2021-03-10 23:55:24,754 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-03-10 23:55:24,754 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:55:24,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:55:24,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1267884794, now seen corresponding path program 5 times [2021-03-10 23:55:24,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:55:24,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341467498] [2021-03-10 23:55:24,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:55:24,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:55:25,240 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:25,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341467498] [2021-03-10 23:55:25,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951814548] [2021-03-10 23:55:25,240 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 [2021-03-10 23:55:25,260 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 23:55:25,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:55:25,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-10 23:55:25,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:55:25,715 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-03-10 23:55:25,767 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_3, v_prenex_5], 2=[A, v_prenex_7]} [2021-03-10 23:55:25,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:25,771 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 [2021-03-10 23:55:25,773 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:25,908 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-03-10 23:55:25,909 INFO L628 ElimStorePlain]: treesize reduction 54, result has 73.1 percent of original size [2021-03-10 23:55:25,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:25,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-03-10 23:55:25,914 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:25,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:55:25,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:25,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:25,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:25,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-10 23:55:25,968 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:25,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:25,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:25,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-10 23:55:25,974 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:26,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:55:26,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:26,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:26,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-10 23:55:26,018 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:26,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:55:26,056 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 23:55:26,056 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:211, output treesize:51 [2021-03-10 23:55:26,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:26,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:55:26,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 23:55:26,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024646156] [2021-03-10 23:55:26,130 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 23:55:26,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:55:26,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 23:55:26,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-03-10 23:55:26,131 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) [2021-03-10 23:55:26,676 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2021-03-10 23:55:26,893 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2021-03-10 23:55:27,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:55:27,744 INFO L93 Difference]: Finished difference Result 1547 states and 4937 transitions. [2021-03-10 23:55:27,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 23:55:27,744 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 [2021-03-10 23:55:27,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:55:27,747 INFO L225 Difference]: With dead ends: 1547 [2021-03-10 23:55:27,747 INFO L226 Difference]: Without dead ends: 1502 [2021-03-10 23:55:27,747 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1927.0ms TimeCoverageRelationStatistics Valid=202, Invalid=988, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 23:55:27,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-03-10 23:55:27,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1171. [2021-03-10 23:55:27,759 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) [2021-03-10 23:55:27,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1171 states to 1171 states and 3916 transitions. [2021-03-10 23:55:27,761 INFO L78 Accepts]: Start accepts. Automaton has 1171 states and 3916 transitions. Word has length 26 [2021-03-10 23:55:27,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:55:27,761 INFO L480 AbstractCegarLoop]: Abstraction has 1171 states and 3916 transitions. [2021-03-10 23:55:27,761 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) [2021-03-10 23:55:27,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1171 states and 3916 transitions. [2021-03-10 23:55:27,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:55:27,763 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:55:27,763 INFO L519 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] [2021-03-10 23:55:27,963 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:55:27,963 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:55:27,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:55:27,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1435653194, now seen corresponding path program 36 times [2021-03-10 23:55:27,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:55:27,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348173188] [2021-03-10 23:55:27,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:55:27,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:55:28,512 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:28,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348173188] [2021-03-10 23:55:28,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983781456] [2021-03-10 23:55:28,513 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 [2021-03-10 23:55:28,533 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:55:28,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:55:28,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-10 23:55:28,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:55:29,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:29,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:29,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:29,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:29,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:29,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:29,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-03-10 23:55:29,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:29,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:29,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:29,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:29,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:29,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:29,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:29,090 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 [2021-03-10 23:55:29,091 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:29,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:29,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:29,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:29,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:29,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:29,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:29,100 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 [2021-03-10 23:55:29,101 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:29,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:29,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:29,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:29,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:29,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:29,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:29,111 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 [2021-03-10 23:55:29,111 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:29,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:29,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:29,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:29,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:29,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:29,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:29,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-03-10 23:55:29,120 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:29,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:29,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:29,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:29,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:29,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:29,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:29,129 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 [2021-03-10 23:55:29,130 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:29,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:29,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:29,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:29,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:29,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:29,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:29,138 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 [2021-03-10 23:55:29,138 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:29,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:29,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:29,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:29,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:29,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:29,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:29,147 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 [2021-03-10 23:55:29,147 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:29,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:29,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:29,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:29,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:29,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:29,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:29,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-03-10 23:55:29,156 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:29,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:29,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:29,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:29,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:29,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:29,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:29,164 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 [2021-03-10 23:55:29,165 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:29,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:29,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:29,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:29,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:29,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:29,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:29,172 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 28 treesize of output 13 [2021-03-10 23:55:29,173 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:29,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:29,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:29,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:29,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:29,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:29,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:29,183 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 41 treesize of output 16 [2021-03-10 23:55:29,184 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:29,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:29,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:29,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:29,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:29,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:29,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:29,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-03-10 23:55:29,192 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:29,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:29,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:29,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:29,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:29,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:29,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:29,200 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 [2021-03-10 23:55:29,201 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:29,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:29,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:29,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:29,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:29,205 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 [2021-03-10 23:55:29,206 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:29,230 INFO L628 ElimStorePlain]: treesize reduction 16, result has 62.8 percent of original size [2021-03-10 23:55:29,231 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:55:29,231 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-03-10 23:55:29,262 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:29,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:55:29,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-03-10 23:55:29,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996274437] [2021-03-10 23:55:29,262 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 23:55:29,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:55:29,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 23:55:29,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-03-10 23:55:29,263 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) [2021-03-10 23:55:30,726 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 50 [2021-03-10 23:55:30,872 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 56 [2021-03-10 23:55:31,000 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 44 [2021-03-10 23:55:31,332 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 52 [2021-03-10 23:55:31,513 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 59 [2021-03-10 23:55:31,918 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 55 [2021-03-10 23:55:32,194 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2021-03-10 23:55:32,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:55:32,298 INFO L93 Difference]: Finished difference Result 1671 states and 5380 transitions. [2021-03-10 23:55:32,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 23:55:32,298 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 [2021-03-10 23:55:32,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:55:32,301 INFO L225 Difference]: With dead ends: 1671 [2021-03-10 23:55:32,301 INFO L226 Difference]: Without dead ends: 1656 [2021-03-10 23:55:32,301 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 3168.3ms TimeCoverageRelationStatistics Valid=375, Invalid=1881, Unknown=0, NotChecked=0, Total=2256 [2021-03-10 23:55:32,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1656 states. [2021-03-10 23:55:32,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1656 to 1201. [2021-03-10 23:55:32,316 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) [2021-03-10 23:55:32,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 3998 transitions. [2021-03-10 23:55:32,318 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 3998 transitions. Word has length 26 [2021-03-10 23:55:32,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:55:32,318 INFO L480 AbstractCegarLoop]: Abstraction has 1201 states and 3998 transitions. [2021-03-10 23:55:32,318 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) [2021-03-10 23:55:32,318 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 3998 transitions. [2021-03-10 23:55:32,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:55:32,320 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:55:32,320 INFO L519 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] [2021-03-10 23:55:32,520 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-03-10 23:55:32,521 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:55:32,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:55:32,521 INFO L82 PathProgramCache]: Analyzing trace with hash -630606018, now seen corresponding path program 6 times [2021-03-10 23:55:32,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:55:32,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462118024] [2021-03-10 23:55:32,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:55:32,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:55:32,712 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-03-10 23:55:33,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:33,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462118024] [2021-03-10 23:55:33,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041357857] [2021-03-10 23:55:33,049 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 [2021-03-10 23:55:33,069 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:55:33,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:55:33,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 23:55:33,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:55:33,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:33,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:33,340 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:55:33,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:55:33,342 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:33,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:33,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:33,352 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 23:55:33,352 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 [2021-03-10 23:55:33,352 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:33,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:33,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:33,365 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:55:33,366 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 [2021-03-10 23:55:33,370 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:33,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:33,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:33,383 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-10 23:55:33,383 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 [2021-03-10 23:55:33,385 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:33,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:33,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:33,397 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-10 23:55:33,398 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 [2021-03-10 23:55:33,399 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:33,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:33,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:33,410 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 23:55:33,410 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 45 treesize of output 25 [2021-03-10 23:55:33,411 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:33,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:33,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:33,422 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 23:55:33,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:55:33,423 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:33,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:33,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:33,433 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 23:55:33,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:55:33,434 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:33,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:33,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:33,444 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 23:55:33,444 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 [2021-03-10 23:55:33,444 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:33,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:33,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:33,454 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 23:55:33,454 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 [2021-03-10 23:55:33,455 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:33,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:33,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:33,467 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 23:55:33,467 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 [2021-03-10 23:55:33,468 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:33,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:33,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:33,481 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:55:33,482 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 [2021-03-10 23:55:33,483 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:33,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:33,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:33,494 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:55:33,494 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 [2021-03-10 23:55:33,499 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:33,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:33,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:33,513 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:55:33,513 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 [2021-03-10 23:55:33,516 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:33,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:33,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:33,530 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-10 23:55:33,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:55:33,532 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:33,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:33,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:33,539 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 23:55:33,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:55:33,540 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:33,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:55:33,621 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 23:55:33,621 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:865, output treesize:221 [2021-03-10 23:55:33,825 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:33,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:55:33,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-03-10 23:55:33,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146509169] [2021-03-10 23:55:33,826 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 23:55:33,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:55:33,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 23:55:33,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-03-10 23:55:33,826 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) [2021-03-10 23:55:34,373 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 53 [2021-03-10 23:55:34,612 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2021-03-10 23:55:34,891 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 48 [2021-03-10 23:55:35,384 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 61 [2021-03-10 23:55:35,593 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 57 [2021-03-10 23:55:35,895 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 62 [2021-03-10 23:55:36,047 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 60 [2021-03-10 23:55:36,630 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 52 [2021-03-10 23:55:36,925 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 42 [2021-03-10 23:55:37,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:55:37,042 INFO L93 Difference]: Finished difference Result 1873 states and 5950 transitions. [2021-03-10 23:55:37,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 23:55:37,042 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 [2021-03-10 23:55:37,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:55:37,045 INFO L225 Difference]: With dead ends: 1873 [2021-03-10 23:55:37,045 INFO L226 Difference]: Without dead ends: 1858 [2021-03-10 23:55:37,045 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 3218.3ms TimeCoverageRelationStatistics Valid=290, Invalid=1602, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 23:55:37,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2021-03-10 23:55:37,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 1210. [2021-03-10 23:55:37,059 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) [2021-03-10 23:55:37,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 4038 transitions. [2021-03-10 23:55:37,062 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 4038 transitions. Word has length 26 [2021-03-10 23:55:37,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:55:37,062 INFO L480 AbstractCegarLoop]: Abstraction has 1210 states and 4038 transitions. [2021-03-10 23:55:37,062 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) [2021-03-10 23:55:37,062 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 4038 transitions. [2021-03-10 23:55:37,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:55:37,064 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:55:37,064 INFO L519 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] [2021-03-10 23:55:37,264 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:55:37,264 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:55:37,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:55:37,264 INFO L82 PathProgramCache]: Analyzing trace with hash 919775546, now seen corresponding path program 37 times [2021-03-10 23:55:37,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:55:37,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736073230] [2021-03-10 23:55:37,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:55:37,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:55:37,676 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-03-10 23:55:37,880 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:37,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736073230] [2021-03-10 23:55:37,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385411168] [2021-03-10 23:55:37,880 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 [2021-03-10 23:55:37,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:55:37,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-10 23:55:37,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:55:38,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:38,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:38,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:38,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:38,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:38,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:38,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-03-10 23:55:38,490 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:38,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:38,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:38,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:38,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:38,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:38,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:38,499 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 [2021-03-10 23:55:38,500 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:38,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:38,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:38,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:38,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:38,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:38,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:38,508 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 [2021-03-10 23:55:38,508 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:38,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:38,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:38,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:38,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:38,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:38,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:38,518 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 [2021-03-10 23:55:38,518 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:38,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:38,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:38,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:38,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:38,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:38,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:38,527 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 [2021-03-10 23:55:38,528 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:38,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:38,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:38,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:38,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:38,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:38,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:38,537 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 39 treesize of output 19 [2021-03-10 23:55:38,537 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:38,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:38,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:38,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:38,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:38,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:38,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:38,547 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 [2021-03-10 23:55:38,548 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:38,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:38,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:38,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:38,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:38,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:38,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:38,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-03-10 23:55:38,558 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:38,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:38,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:38,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:38,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:38,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:38,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:38,574 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 [2021-03-10 23:55:38,575 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:38,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:38,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:38,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:38,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:38,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:38,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:38,583 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 32 treesize of output 16 [2021-03-10 23:55:38,584 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:38,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:38,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:38,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:38,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:38,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:38,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:38,592 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 [2021-03-10 23:55:38,592 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:38,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:38,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:38,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:38,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:38,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:38,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:38,600 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 [2021-03-10 23:55:38,601 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:38,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:38,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:38,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:38,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:38,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:38,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:38,610 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 [2021-03-10 23:55:38,611 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:38,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:38,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:38,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:38,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:38,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:38,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:38,619 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 [2021-03-10 23:55:38,619 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:38,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:38,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:38,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:38,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:38,625 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 [2021-03-10 23:55:38,625 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:38,652 INFO L628 ElimStorePlain]: treesize reduction 16, result has 62.8 percent of original size [2021-03-10 23:55:38,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:55:38,654 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-03-10 23:55:38,685 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:38,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:55:38,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-03-10 23:55:38,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240391070] [2021-03-10 23:55:38,686 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 23:55:38,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:55:38,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 23:55:38,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-03-10 23:55:38,686 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) [2021-03-10 23:55:40,005 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 48 [2021-03-10 23:55:40,131 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 40 [2021-03-10 23:55:40,263 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 49 [2021-03-10 23:55:40,415 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 56 [2021-03-10 23:55:40,558 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 56 [2021-03-10 23:55:40,958 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 53 [2021-03-10 23:55:41,142 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 58 [2021-03-10 23:55:41,499 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-03-10 23:55:41,658 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 55 [2021-03-10 23:55:41,944 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 52 [2021-03-10 23:55:42,243 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2021-03-10 23:55:42,458 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 56 [2021-03-10 23:55:42,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:55:42,618 INFO L93 Difference]: Finished difference Result 1907 states and 6071 transitions. [2021-03-10 23:55:42,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-10 23:55:42,619 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 [2021-03-10 23:55:42,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:55:42,621 INFO L225 Difference]: With dead ends: 1907 [2021-03-10 23:55:42,621 INFO L226 Difference]: Without dead ends: 1892 [2021-03-10 23:55:42,622 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 3965.6ms TimeCoverageRelationStatistics Valid=479, Invalid=2277, Unknown=0, NotChecked=0, Total=2756 [2021-03-10 23:55:42,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1892 states. [2021-03-10 23:55:42,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1892 to 1221. [2021-03-10 23:55:42,636 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) [2021-03-10 23:55:42,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 4082 transitions. [2021-03-10 23:55:42,638 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 4082 transitions. Word has length 26 [2021-03-10 23:55:42,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:55:42,638 INFO L480 AbstractCegarLoop]: Abstraction has 1221 states and 4082 transitions. [2021-03-10 23:55:42,638 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) [2021-03-10 23:55:42,638 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 4082 transitions. [2021-03-10 23:55:42,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:55:42,640 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:55:42,640 INFO L519 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] [2021-03-10 23:55:42,840 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-03-10 23:55:42,840 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:55:42,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:55:42,840 INFO L82 PathProgramCache]: Analyzing trace with hash -56543298, now seen corresponding path program 38 times [2021-03-10 23:55:42,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:55:42,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076552029] [2021-03-10 23:55:42,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:55:42,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:55:43,230 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2021-03-10 23:55:43,342 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2021-03-10 23:55:43,581 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:43,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076552029] [2021-03-10 23:55:43,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710346147] [2021-03-10 23:55:43,582 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 [2021-03-10 23:55:43,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:55:43,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:55:43,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 23:55:43,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:55:44,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:44,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:44,268 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-03-10 23:55:44,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-03-10 23:55:44,274 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:44,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:44,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:44,305 INFO L354 Elim1Store]: treesize reduction 16, result has 40.7 percent of original size [2021-03-10 23:55:44,305 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 [2021-03-10 23:55:44,307 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:44,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:44,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:44,335 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-03-10 23:55:44,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-03-10 23:55:44,341 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:44,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:44,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:44,379 INFO L354 Elim1Store]: treesize reduction 9, result has 66.7 percent of original size [2021-03-10 23:55:44,379 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 33 treesize of output 36 [2021-03-10 23:55:44,384 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:44,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:44,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:44,404 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-03-10 23:55:44,404 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 [2021-03-10 23:55:44,405 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:44,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:44,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:44,424 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-03-10 23:55:44,424 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 39 treesize of output 1 [2021-03-10 23:55:44,425 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:44,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:44,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:44,446 INFO L354 Elim1Store]: treesize reduction 24, result has 11.1 percent of original size [2021-03-10 23:55:44,446 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 [2021-03-10 23:55:44,447 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:44,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:44,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:44,465 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-03-10 23:55:44,465 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 [2021-03-10 23:55:44,466 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:44,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:44,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:44,484 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-03-10 23:55:44,484 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 [2021-03-10 23:55:44,485 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:44,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:44,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:44,514 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-03-10 23:55:44,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 28 [2021-03-10 23:55:44,522 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:44,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:44,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:44,541 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-03-10 23:55:44,541 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 [2021-03-10 23:55:44,541 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:44,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:44,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:44,566 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-03-10 23:55:44,567 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 [2021-03-10 23:55:44,568 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:44,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:44,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:44,591 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:55:44,592 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 [2021-03-10 23:55:44,601 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:44,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:44,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:44,619 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-03-10 23:55:44,619 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 [2021-03-10 23:55:44,620 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:44,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:44,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:44,635 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-03-10 23:55:44,635 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 [2021-03-10 23:55:44,636 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:44,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:44,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:44,645 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-03-10 23:55:44,645 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 [2021-03-10 23:55:44,645 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:44,763 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2021-03-10 23:55:44,763 INFO L628 ElimStorePlain]: treesize reduction 91, result has 59.4 percent of original size [2021-03-10 23:55:44,765 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 23:55:44,765 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:841, output treesize:148 [2021-03-10 23:55:44,926 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:44,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:55:44,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-03-10 23:55:44,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027191051] [2021-03-10 23:55:44,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 23:55:44,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:55:44,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 23:55:44,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:55:44,927 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) [2021-03-10 23:55:45,926 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 42 [2021-03-10 23:55:46,728 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 51 [2021-03-10 23:55:46,890 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 62 [2021-03-10 23:55:47,248 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 48 [2021-03-10 23:55:47,929 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 53 [2021-03-10 23:55:48,394 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 53 [2021-03-10 23:55:48,537 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2021-03-10 23:55:48,717 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2021-03-10 23:55:49,117 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 72 [2021-03-10 23:55:49,491 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 70 [2021-03-10 23:55:49,662 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 41 [2021-03-10 23:55:49,968 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2021-03-10 23:55:50,210 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 71 [2021-03-10 23:55:50,401 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 42 [2021-03-10 23:55:50,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:55:50,552 INFO L93 Difference]: Finished difference Result 2629 states and 8153 transitions. [2021-03-10 23:55:50,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-10 23:55:50,552 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 [2021-03-10 23:55:50,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:55:50,556 INFO L225 Difference]: With dead ends: 2629 [2021-03-10 23:55:50,556 INFO L226 Difference]: Without dead ends: 2584 [2021-03-10 23:55:50,557 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1219 ImplicationChecksByTransitivity, 5857.2ms TimeCoverageRelationStatistics Valid=599, Invalid=3691, Unknown=0, NotChecked=0, Total=4290 [2021-03-10 23:55:50,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2584 states. [2021-03-10 23:55:50,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2584 to 1396. [2021-03-10 23:55:50,577 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) [2021-03-10 23:55:50,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1396 states to 1396 states and 4626 transitions. [2021-03-10 23:55:50,580 INFO L78 Accepts]: Start accepts. Automaton has 1396 states and 4626 transitions. Word has length 26 [2021-03-10 23:55:50,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:55:50,580 INFO L480 AbstractCegarLoop]: Abstraction has 1396 states and 4626 transitions. [2021-03-10 23:55:50,580 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) [2021-03-10 23:55:50,580 INFO L276 IsEmpty]: Start isEmpty. Operand 1396 states and 4626 transitions. [2021-03-10 23:55:50,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:55:50,582 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:55:50,582 INFO L519 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] [2021-03-10 23:55:50,783 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable314 [2021-03-10 23:55:50,783 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:55:50,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:55:50,783 INFO L82 PathProgramCache]: Analyzing trace with hash -2141610526, now seen corresponding path program 7 times [2021-03-10 23:55:50,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:55:50,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514117150] [2021-03-10 23:55:50,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:55:50,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:55:51,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:51,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514117150] [2021-03-10 23:55:51,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627395661] [2021-03-10 23:55:51,255 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) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:55:51,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:55:51,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 23:55:51,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:55:51,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:51,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:51,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:51,690 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-03-10 23:55:51,691 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:51,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:51,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:51,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:51,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-10 23:55:51,698 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:51,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:51,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:51,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:51,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-10 23:55:51,705 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:51,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:51,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:51,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:51,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:55:51,712 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:51,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:51,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:51,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:51,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-10 23:55:51,719 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:51,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:51,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:51,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:51,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-10 23:55:51,727 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:51,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:51,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:51,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:51,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-10 23:55:51,733 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:51,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:51,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:51,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:51,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-10 23:55:51,739 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:51,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:51,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:51,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:51,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-10 23:55:51,745 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:51,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:51,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:51,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:51,751 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 26 treesize of output 13 [2021-03-10 23:55:51,752 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:51,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:51,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:51,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:51,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:55:51,760 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:51,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:51,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:51,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:51,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:55:51,767 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:51,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:51,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:51,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:51,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:55:51,774 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:51,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:51,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:51,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:51,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-10 23:55:51,780 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:51,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:55:51,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:55:51,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-10 23:55:51,784 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:51,858 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-03-10 23:55:51,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 23:55:51,863 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-03-10 23:55:51,915 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:51,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:55:51,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 23:55:51,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865742221] [2021-03-10 23:55:51,916 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 23:55:51,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:55:51,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 23:55:51,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-03-10 23:55:51,916 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) [2021-03-10 23:55:52,499 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-03-10 23:55:53,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:55:53,017 INFO L93 Difference]: Finished difference Result 1801 states and 5846 transitions. [2021-03-10 23:55:53,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 23:55:53,018 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 [2021-03-10 23:55:53,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:55:53,020 INFO L225 Difference]: With dead ends: 1801 [2021-03-10 23:55:53,020 INFO L226 Difference]: Without dead ends: 1786 [2021-03-10 23:55:53,021 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1363.3ms TimeCoverageRelationStatistics Valid=171, Invalid=641, Unknown=0, NotChecked=0, Total=812 [2021-03-10 23:55:53,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-03-10 23:55:53,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1407. [2021-03-10 23:55:53,037 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) [2021-03-10 23:55:53,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1407 states to 1407 states and 4659 transitions. [2021-03-10 23:55:53,039 INFO L78 Accepts]: Start accepts. Automaton has 1407 states and 4659 transitions. Word has length 26 [2021-03-10 23:55:53,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:55:53,039 INFO L480 AbstractCegarLoop]: Abstraction has 1407 states and 4659 transitions. [2021-03-10 23:55:53,040 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) [2021-03-10 23:55:53,040 INFO L276 IsEmpty]: Start isEmpty. Operand 1407 states and 4659 transitions. [2021-03-10 23:55:53,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:55:53,041 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:55:53,041 INFO L519 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] [2021-03-10 23:55:53,242 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable418,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:55:53,242 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:55:53,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:55:53,242 INFO L82 PathProgramCache]: Analyzing trace with hash 124958754, now seen corresponding path program 8 times [2021-03-10 23:55:53,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:55:53,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678781699] [2021-03-10 23:55:53,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:55:53,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:55:53,427 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-03-10 23:55:53,727 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:53,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678781699] [2021-03-10 23:55:53,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701880649] [2021-03-10 23:55:53,727 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 [2021-03-10 23:55:53,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:55:53,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:55:53,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 23:55:53,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:55:54,148 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-03-10 23:55:54,232 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-10 23:55:54,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:55:54,234 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:54,371 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-03-10 23:55:54,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:55:54,389 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:55:54,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-10 23:55:54,397 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:54,526 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-03-10 23:55:54,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:55:54,544 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:55:54,544 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 33 treesize of output 35 [2021-03-10 23:55:54,546 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:54,701 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-03-10 23:55:54,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:55:54,723 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-10 23:55:54,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-10 23:55:54,728 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:54,871 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-03-10 23:55:54,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:55:54,891 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-10 23:55:54,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-10 23:55:54,896 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:55,027 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-03-10 23:55:55,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:55:55,044 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:55:55,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:55:55,047 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:55,182 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-03-10 23:55:55,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:55:55,203 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-10 23:55:55,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-10 23:55:55,205 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:55,332 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-03-10 23:55:55,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:55:55,352 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-10 23:55:55,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:55:55,357 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 23:55:55,480 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-03-10 23:55:55,480 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:55:55,493 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 23:55:55,493 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:365, output treesize:376 [2021-03-10 23:55:55,800 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-03-10 23:55:55,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:55,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:55:55,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-03-10 23:55:55,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244360] [2021-03-10 23:55:55,937 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 23:55:55,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:55:55,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 23:55:55,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-03-10 23:55:55,937 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) [2021-03-10 23:55:56,516 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2021-03-10 23:55:56,842 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2021-03-10 23:55:56,972 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 57 [2021-03-10 23:55:57,192 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2021-03-10 23:55:57,329 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-03-10 23:55:57,585 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-03-10 23:55:58,051 WARN L205 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 76 [2021-03-10 23:55:58,290 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2021-03-10 23:55:58,682 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 31 [2021-03-10 23:55:58,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:55:58,817 INFO L93 Difference]: Finished difference Result 1848 states and 5971 transitions. [2021-03-10 23:55:58,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 23:55:58,817 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 [2021-03-10 23:55:58,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:55:58,820 INFO L225 Difference]: With dead ends: 1848 [2021-03-10 23:55:58,821 INFO L226 Difference]: Without dead ends: 1833 [2021-03-10 23:55:58,821 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 3381.3ms TimeCoverageRelationStatistics Valid=220, Invalid=1112, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 23:55:58,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1833 states. [2021-03-10 23:55:58,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1833 to 1415. [2021-03-10 23:55:58,839 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) [2021-03-10 23:55:58,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1415 states to 1415 states and 4684 transitions. [2021-03-10 23:55:58,843 INFO L78 Accepts]: Start accepts. Automaton has 1415 states and 4684 transitions. Word has length 26 [2021-03-10 23:55:58,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:55:58,843 INFO L480 AbstractCegarLoop]: Abstraction has 1415 states and 4684 transitions. [2021-03-10 23:55:58,843 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) [2021-03-10 23:55:58,843 INFO L276 IsEmpty]: Start isEmpty. Operand 1415 states and 4684 transitions. [2021-03-10 23:55:58,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:55:58,845 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:55:58,845 INFO L519 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] [2021-03-10 23:55:59,045 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable450 [2021-03-10 23:55:59,046 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:55:59,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:55:59,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1812450954, now seen corresponding path program 9 times [2021-03-10 23:55:59,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:55:59,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154053439] [2021-03-10 23:55:59,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:55:59,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:55:59,491 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:55:59,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154053439] [2021-03-10 23:55:59,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464354184] [2021-03-10 23:55:59,492 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 [2021-03-10 23:55:59,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:55:59,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:55:59,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-10 23:55:59,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:56:00,043 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2021-03-10 23:56:00,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:00,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:00,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:00,330 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 21 treesize of output 13 [2021-03-10 23:56:00,331 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:00,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:00,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:00,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-10 23:56:00,338 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:00,507 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-03-10 23:56:00,507 INFO L628 ElimStorePlain]: treesize reduction 98, result has 62.0 percent of original size [2021-03-10 23:56:00,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:00,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:00,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-10 23:56:00,513 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:00,577 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:56:00,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:00,583 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 [2021-03-10 23:56:00,585 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:00,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:00,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:00,590 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 28 treesize of output 16 [2021-03-10 23:56:00,591 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:00,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:56:00,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:00,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:00,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:56:00,666 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:00,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:56:00,716 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 23:56:00,716 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 12 variables, input treesize:309, output treesize:51 [2021-03-10 23:56:00,775 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:56:00,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:56:00,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 23:56:00,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683090716] [2021-03-10 23:56:00,776 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 23:56:00,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:56:00,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 23:56:00,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-03-10 23:56:00,776 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) [2021-03-10 23:56:01,511 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 49 [2021-03-10 23:56:01,801 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 53 [2021-03-10 23:56:02,033 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 63 [2021-03-10 23:56:02,385 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 68 [2021-03-10 23:56:02,738 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 75 [2021-03-10 23:56:02,952 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-03-10 23:56:03,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:56:03,049 INFO L93 Difference]: Finished difference Result 1769 states and 5693 transitions. [2021-03-10 23:56:03,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 23:56:03,050 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 [2021-03-10 23:56:03,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:56:03,052 INFO L225 Difference]: With dead ends: 1769 [2021-03-10 23:56:03,052 INFO L226 Difference]: Without dead ends: 1754 [2021-03-10 23:56:03,053 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 2730.8ms TimeCoverageRelationStatistics Valid=217, Invalid=839, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 23:56:03,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1754 states. [2021-03-10 23:56:03,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1754 to 1433. [2021-03-10 23:56:03,067 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) [2021-03-10 23:56:03,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1433 states to 1433 states and 4750 transitions. [2021-03-10 23:56:03,069 INFO L78 Accepts]: Start accepts. Automaton has 1433 states and 4750 transitions. Word has length 26 [2021-03-10 23:56:03,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:56:03,069 INFO L480 AbstractCegarLoop]: Abstraction has 1433 states and 4750 transitions. [2021-03-10 23:56:03,069 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) [2021-03-10 23:56:03,070 INFO L276 IsEmpty]: Start isEmpty. Operand 1433 states and 4750 transitions. [2021-03-10 23:56:03,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:56:03,071 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:56:03,071 INFO L519 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] [2021-03-10 23:56:03,272 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2021-03-10 23:56:03,272 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:56:03,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:56:03,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1980260046, now seen corresponding path program 10 times [2021-03-10 23:56:03,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:56:03,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131381562] [2021-03-10 23:56:03,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:56:03,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:56:03,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:56:03,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131381562] [2021-03-10 23:56:03,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307899139] [2021-03-10 23:56:03,796 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 [2021-03-10 23:56:03,815 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:56:03,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:56:03,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-10 23:56:03,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:56:04,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:04,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:04,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:04,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:56:04,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:04,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:04,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:04,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:04,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-10 23:56:04,184 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:04,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:04,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:04,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:04,189 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 21 treesize of output 13 [2021-03-10 23:56:04,190 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:04,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:04,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:04,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:04,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-10 23:56:04,196 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:04,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:04,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:04,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:04,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-10 23:56:04,202 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:04,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:04,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:04,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:04,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-10 23:56:04,209 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:04,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:04,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:04,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:04,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-10 23:56:04,216 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:04,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:04,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:04,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:04,221 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 33 treesize of output 19 [2021-03-10 23:56:04,222 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:04,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:04,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:04,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:04,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:56:04,228 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:04,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:04,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:04,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:04,234 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 [2021-03-10 23:56:04,235 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:04,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:04,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:04,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:04,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-10 23:56:04,240 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:04,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:04,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:04,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:04,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-10 23:56:04,247 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:04,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:04,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:04,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:04,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-10 23:56:04,253 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:04,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:04,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:04,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:04,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-03-10 23:56:04,260 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:04,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:04,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:04,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-10 23:56:04,264 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:04,339 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-03-10 23:56:04,340 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 23:56:04,340 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-03-10 23:56:04,411 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:56:04,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:56:04,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-10 23:56:04,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304762324] [2021-03-10 23:56:04,412 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 23:56:04,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:56:04,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 23:56:04,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-03-10 23:56:04,412 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) [2021-03-10 23:56:05,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:56:05,210 INFO L93 Difference]: Finished difference Result 1743 states and 5703 transitions. [2021-03-10 23:56:05,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 23:56:05,211 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 [2021-03-10 23:56:05,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:56:05,213 INFO L225 Difference]: With dead ends: 1743 [2021-03-10 23:56:05,214 INFO L226 Difference]: Without dead ends: 1728 [2021-03-10 23:56:05,214 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1176.5ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:56:05,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1728 states. [2021-03-10 23:56:05,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1728 to 1442. [2021-03-10 23:56:05,228 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) [2021-03-10 23:56:05,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 4786 transitions. [2021-03-10 23:56:05,230 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 4786 transitions. Word has length 26 [2021-03-10 23:56:05,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:56:05,230 INFO L480 AbstractCegarLoop]: Abstraction has 1442 states and 4786 transitions. [2021-03-10 23:56:05,230 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) [2021-03-10 23:56:05,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 4786 transitions. [2021-03-10 23:56:05,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:56:05,232 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:56:05,232 INFO L519 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] [2021-03-10 23:56:05,433 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2021-03-10 23:56:05,433 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:56:05,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:56:05,433 INFO L82 PathProgramCache]: Analyzing trace with hash 247191222, now seen corresponding path program 11 times [2021-03-10 23:56:05,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:56:05,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611580489] [2021-03-10 23:56:05,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:56:05,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:56:05,873 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:56:05,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611580489] [2021-03-10 23:56:05,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291317778] [2021-03-10 23:56:05,874 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 [2021-03-10 23:56:05,893 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 23:56:05,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:56:05,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-10 23:56:05,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:56:06,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:06,271 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 23:56:06,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:56:06,272 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:06,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:06,280 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 23:56:06,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-03-10 23:56:06,281 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:06,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:06,293 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-10 23:56:06,293 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 [2021-03-10 23:56:06,295 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:06,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:06,306 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:56:06,306 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 28 treesize of output 24 [2021-03-10 23:56:06,311 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:06,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:06,326 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-10 23:56:06,326 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 [2021-03-10 23:56:06,328 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:06,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:06,339 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:56:06,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:56:06,343 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:06,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:06,356 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:56:06,356 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 26 treesize of output 24 [2021-03-10 23:56:06,357 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:06,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:06,367 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 23:56:06,367 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 [2021-03-10 23:56:06,368 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:06,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:06,380 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:56:06,381 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 33 treesize of output 27 [2021-03-10 23:56:06,382 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:06,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:06,392 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 23:56:06,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:56:06,392 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:06,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:06,404 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:56:06,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:56:06,407 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:06,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:06,421 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-10 23:56:06,421 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 [2021-03-10 23:56:06,422 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:06,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:06,431 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 23:56:06,431 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 [2021-03-10 23:56:06,432 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:06,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:06,440 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 23:56:06,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:56:06,441 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:06,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:06,450 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 23:56:06,450 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 [2021-03-10 23:56:06,451 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:06,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:06,456 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 23:56:06,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:56:06,462 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:06,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:56:06,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 23:56:06,565 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:657, output treesize:174 [2021-03-10 23:56:06,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:56:06,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:56:06,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 23:56:06,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521545434] [2021-03-10 23:56:06,784 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 23:56:06,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:56:06,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 23:56:06,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-03-10 23:56:06,784 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) [2021-03-10 23:56:07,242 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 38 [2021-03-10 23:56:07,476 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 55 [2021-03-10 23:56:08,141 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2021-03-10 23:56:08,385 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 50 [2021-03-10 23:56:08,579 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2021-03-10 23:56:08,762 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2021-03-10 23:56:09,405 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2021-03-10 23:56:09,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:56:09,677 INFO L93 Difference]: Finished difference Result 2256 states and 7236 transitions. [2021-03-10 23:56:09,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 23:56:09,677 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 [2021-03-10 23:56:09,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:56:09,681 INFO L225 Difference]: With dead ends: 2256 [2021-03-10 23:56:09,681 INFO L226 Difference]: Without dead ends: 2226 [2021-03-10 23:56:09,681 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 2930.9ms TimeCoverageRelationStatistics Valid=322, Invalid=1570, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 23:56:09,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2021-03-10 23:56:09,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 1442. [2021-03-10 23:56:09,699 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) [2021-03-10 23:56:09,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 4786 transitions. [2021-03-10 23:56:09,701 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 4786 transitions. Word has length 26 [2021-03-10 23:56:09,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:56:09,701 INFO L480 AbstractCegarLoop]: Abstraction has 1442 states and 4786 transitions. [2021-03-10 23:56:09,702 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) [2021-03-10 23:56:09,702 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 4786 transitions. [2021-03-10 23:56:09,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:56:09,704 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:56:09,704 INFO L519 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] [2021-03-10 23:56:09,904 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable530 [2021-03-10 23:56:09,904 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:56:09,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:56:09,904 INFO L82 PathProgramCache]: Analyzing trace with hash -249530138, now seen corresponding path program 12 times [2021-03-10 23:56:09,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:56:09,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043029770] [2021-03-10 23:56:09,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:56:09,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:56:10,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:56:10,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043029770] [2021-03-10 23:56:10,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18010367] [2021-03-10 23:56:10,339 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 [2021-03-10 23:56:10,366 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:56:10,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:56:10,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-10 23:56:10,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:56:10,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:10,621 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 23:56:10,621 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 28 treesize of output 16 [2021-03-10 23:56:10,622 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:10,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:10,630 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 23:56:10,630 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 [2021-03-10 23:56:10,631 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:10,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:10,642 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-10 23:56:10,643 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 [2021-03-10 23:56:10,644 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:10,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:10,653 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 23:56:10,653 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 [2021-03-10 23:56:10,654 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:10,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:10,664 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:56:10,664 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 [2021-03-10 23:56:10,666 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:10,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:10,677 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-10 23:56:10,678 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 [2021-03-10 23:56:10,679 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:10,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:10,688 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 23:56:10,688 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 33 treesize of output 19 [2021-03-10 23:56:10,689 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:10,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:10,700 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:56:10,700 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 [2021-03-10 23:56:10,701 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:10,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:10,710 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 23:56:10,710 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 [2021-03-10 23:56:10,711 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:10,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:10,721 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:56:10,721 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 16 treesize of output 18 [2021-03-10 23:56:10,725 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:10,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:10,735 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 23:56:10,735 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 [2021-03-10 23:56:10,736 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:10,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:10,747 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:56:10,747 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 33 treesize of output 27 [2021-03-10 23:56:10,755 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:10,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:10,767 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-10 23:56:10,767 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 [2021-03-10 23:56:10,769 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:10,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:10,780 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:56:10,780 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 [2021-03-10 23:56:10,784 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:10,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:10,792 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 23:56:10,792 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 [2021-03-10 23:56:10,793 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:10,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:10,798 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 23:56:10,798 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 31 treesize of output 19 [2021-03-10 23:56:10,799 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:10,873 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:56:10,875 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 23:56:10,875 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-03-10 23:56:11,068 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:56:11,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:56:11,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-03-10 23:56:11,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873509509] [2021-03-10 23:56:11,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 23:56:11,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:56:11,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 23:56:11,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-03-10 23:56:11,069 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) [2021-03-10 23:56:11,499 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2021-03-10 23:56:11,746 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2021-03-10 23:56:11,873 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2021-03-10 23:56:12,233 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 48 [2021-03-10 23:56:12,749 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 49 [2021-03-10 23:56:12,981 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2021-03-10 23:56:13,141 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 57 [2021-03-10 23:56:13,761 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2021-03-10 23:56:14,012 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 42 [2021-03-10 23:56:14,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:56:14,077 INFO L93 Difference]: Finished difference Result 2069 states and 6722 transitions. [2021-03-10 23:56:14,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 23:56:14,078 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 [2021-03-10 23:56:14,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:56:14,081 INFO L225 Difference]: With dead ends: 2069 [2021-03-10 23:56:14,081 INFO L226 Difference]: Without dead ends: 2054 [2021-03-10 23:56:14,081 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 3064.9ms TimeCoverageRelationStatistics Valid=326, Invalid=1480, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 23:56:14,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2054 states. [2021-03-10 23:56:14,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2054 to 1442. [2021-03-10 23:56:14,098 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) [2021-03-10 23:56:14,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 4786 transitions. [2021-03-10 23:56:14,100 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 4786 transitions. Word has length 26 [2021-03-10 23:56:14,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:56:14,100 INFO L480 AbstractCegarLoop]: Abstraction has 1442 states and 4786 transitions. [2021-03-10 23:56:14,100 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) [2021-03-10 23:56:14,100 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 4786 transitions. [2021-03-10 23:56:14,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:56:14,102 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:56:14,102 INFO L519 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] [2021-03-10 23:56:14,303 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable571,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:56:14,303 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:56:14,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:56:14,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1219202938, now seen corresponding path program 39 times [2021-03-10 23:56:14,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:56:14,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034585115] [2021-03-10 23:56:14,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:56:14,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:56:14,816 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:56:14,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034585115] [2021-03-10 23:56:14,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857078220] [2021-03-10 23:56:14,816 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 [2021-03-10 23:56:14,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:56:14,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:56:14,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 23:56:14,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:56:15,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:15,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:15,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:15,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:15,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:15,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:15,427 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 [2021-03-10 23:56:15,427 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:15,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:15,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:15,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:15,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:15,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:15,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:15,436 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 [2021-03-10 23:56:15,437 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:15,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:15,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:15,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:15,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:15,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:15,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:15,445 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 [2021-03-10 23:56:15,446 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:15,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:15,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:15,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:15,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:15,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:15,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:15,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-03-10 23:56:15,456 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:15,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:15,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:15,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:15,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:15,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:15,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:15,465 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 [2021-03-10 23:56:15,466 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:15,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:15,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:15,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:15,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:15,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:15,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:15,475 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 [2021-03-10 23:56:15,476 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:15,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:15,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:15,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:15,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:15,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:15,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:15,487 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 34 treesize of output 16 [2021-03-10 23:56:15,488 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:15,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:15,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:15,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:15,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:15,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:15,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:15,498 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 30 treesize of output 16 [2021-03-10 23:56:15,499 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:15,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:15,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:15,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:15,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:15,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:15,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:15,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-03-10 23:56:15,511 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:15,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:15,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:15,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:15,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:15,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:15,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:15,522 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 [2021-03-10 23:56:15,523 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:15,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:15,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:15,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:15,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:15,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:15,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:15,535 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 [2021-03-10 23:56:15,536 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:15,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:15,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:15,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:15,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:15,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:15,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:15,545 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 [2021-03-10 23:56:15,547 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:15,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:15,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:15,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:15,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:15,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:15,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:15,556 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 39 treesize of output 16 [2021-03-10 23:56:15,557 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:15,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:15,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:15,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:15,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:15,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:15,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:15,564 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 [2021-03-10 23:56:15,565 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:15,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:15,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:15,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:15,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:15,569 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 [2021-03-10 23:56:15,570 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:15,597 INFO L628 ElimStorePlain]: treesize reduction 32, result has 45.8 percent of original size [2021-03-10 23:56:15,598 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:56:15,598 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-03-10 23:56:15,623 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:56:15,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:56:15,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-03-10 23:56:15,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890372230] [2021-03-10 23:56:15,624 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 23:56:15,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:56:15,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 23:56:15,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-03-10 23:56:15,624 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) [2021-03-10 23:56:16,068 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 58 [2021-03-10 23:56:16,565 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 67 [2021-03-10 23:56:17,197 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 61 [2021-03-10 23:56:17,411 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2021-03-10 23:56:17,558 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2021-03-10 23:56:17,958 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 65 [2021-03-10 23:56:18,625 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 51 [2021-03-10 23:56:18,757 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 60 [2021-03-10 23:56:19,038 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-03-10 23:56:19,333 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 52 [2021-03-10 23:56:19,530 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 51 [2021-03-10 23:56:20,188 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-03-10 23:56:20,347 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2021-03-10 23:56:20,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:56:20,666 INFO L93 Difference]: Finished difference Result 2538 states and 7861 transitions. [2021-03-10 23:56:20,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-03-10 23:56:20,667 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 [2021-03-10 23:56:20,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:56:20,670 INFO L225 Difference]: With dead ends: 2538 [2021-03-10 23:56:20,670 INFO L226 Difference]: Without dead ends: 2493 [2021-03-10 23:56:20,671 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1407 ImplicationChecksByTransitivity, 4760.2ms TimeCoverageRelationStatistics Valid=698, Invalid=3592, Unknown=0, NotChecked=0, Total=4290 [2021-03-10 23:56:20,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2493 states. [2021-03-10 23:56:20,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2493 to 1453. [2021-03-10 23:56:20,689 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) [2021-03-10 23:56:20,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1453 states to 1453 states and 4837 transitions. [2021-03-10 23:56:20,692 INFO L78 Accepts]: Start accepts. Automaton has 1453 states and 4837 transitions. Word has length 26 [2021-03-10 23:56:20,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:56:20,692 INFO L480 AbstractCegarLoop]: Abstraction has 1453 states and 4837 transitions. [2021-03-10 23:56:20,692 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) [2021-03-10 23:56:20,692 INFO L276 IsEmpty]: Start isEmpty. Operand 1453 states and 4837 transitions. [2021-03-10 23:56:20,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:56:20,694 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:56:20,694 INFO L519 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] [2021-03-10 23:56:20,895 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable588 [2021-03-10 23:56:20,895 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:56:20,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:56:20,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1873451990, now seen corresponding path program 40 times [2021-03-10 23:56:20,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:56:20,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395357382] [2021-03-10 23:56:20,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:56:20,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:56:21,396 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:56:21,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395357382] [2021-03-10 23:56:21,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118318132] [2021-03-10 23:56:21,396 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 [2021-03-10 23:56:21,415 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:56:21,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:56:21,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-10 23:56:21,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:56:21,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:21,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:21,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:21,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:21,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:21,984 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 [2021-03-10 23:56:21,985 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:21,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:21,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:21,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:21,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:21,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:21,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-03-10 23:56:21,994 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:21,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:21,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:21,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:22,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:22,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:22,004 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 [2021-03-10 23:56:22,005 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:22,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:22,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:22,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:22,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:22,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:22,013 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 33 treesize of output 13 [2021-03-10 23:56:22,015 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:22,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:22,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:22,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:22,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:22,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:22,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-03-10 23:56:22,025 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:22,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:22,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:22,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:22,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:22,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:22,035 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 [2021-03-10 23:56:22,036 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:22,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:22,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:22,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:22,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:22,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:22,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-03-10 23:56:22,046 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:22,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:22,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:22,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:22,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:22,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:22,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-03-10 23:56:22,057 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:22,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:22,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:22,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:22,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:22,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:22,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-03-10 23:56:22,067 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:22,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:22,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:22,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:22,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:22,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:22,076 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 [2021-03-10 23:56:22,077 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:22,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:22,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:22,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:22,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:22,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:22,087 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 [2021-03-10 23:56:22,088 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:22,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:22,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:22,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:22,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:22,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:22,096 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 [2021-03-10 23:56:22,097 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:22,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:22,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:22,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:22,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:22,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:22,105 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 [2021-03-10 23:56:22,106 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:22,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:22,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:22,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:22,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:22,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:22,114 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 [2021-03-10 23:56:22,115 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:22,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:22,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:22,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:22,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-03-10 23:56:22,121 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:22,152 INFO L628 ElimStorePlain]: treesize reduction 32, result has 45.8 percent of original size [2021-03-10 23:56:22,153 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:56:22,154 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-03-10 23:56:22,178 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:56:22,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:56:22,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-03-10 23:56:22,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976529951] [2021-03-10 23:56:22,179 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 23:56:22,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:56:22,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 23:56:22,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-03-10 23:56:22,179 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) [2021-03-10 23:56:22,631 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2021-03-10 23:56:23,054 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 63 [2021-03-10 23:56:23,268 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2021-03-10 23:56:23,583 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2021-03-10 23:56:23,795 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-03-10 23:56:24,113 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 65 [2021-03-10 23:56:24,566 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 59 [2021-03-10 23:56:25,643 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-03-10 23:56:25,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:56:25,849 INFO L93 Difference]: Finished difference Result 2460 states and 7663 transitions. [2021-03-10 23:56:25,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-10 23:56:25,849 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 [2021-03-10 23:56:25,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:56:25,852 INFO L225 Difference]: With dead ends: 2460 [2021-03-10 23:56:25,852 INFO L226 Difference]: Without dead ends: 2415 [2021-03-10 23:56:25,853 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1019 ImplicationChecksByTransitivity, 3588.8ms TimeCoverageRelationStatistics Valid=580, Invalid=2612, Unknown=0, NotChecked=0, Total=3192 [2021-03-10 23:56:25,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2415 states. [2021-03-10 23:56:25,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2415 to 1453. [2021-03-10 23:56:25,871 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) [2021-03-10 23:56:25,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1453 states to 1453 states and 4838 transitions. [2021-03-10 23:56:25,873 INFO L78 Accepts]: Start accepts. Automaton has 1453 states and 4838 transitions. Word has length 26 [2021-03-10 23:56:25,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:56:25,873 INFO L480 AbstractCegarLoop]: Abstraction has 1453 states and 4838 transitions. [2021-03-10 23:56:25,873 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) [2021-03-10 23:56:25,873 INFO L276 IsEmpty]: Start isEmpty. Operand 1453 states and 4838 transitions. [2021-03-10 23:56:25,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:56:25,875 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:56:25,875 INFO L519 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] [2021-03-10 23:56:26,076 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable678 [2021-03-10 23:56:26,076 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:56:26,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:56:26,076 INFO L82 PathProgramCache]: Analyzing trace with hash -39803338, now seen corresponding path program 41 times [2021-03-10 23:56:26,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:56:26,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318273190] [2021-03-10 23:56:26,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:56:26,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:56:26,621 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:56:26,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318273190] [2021-03-10 23:56:26,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629113229] [2021-03-10 23:56:26,622 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 [2021-03-10 23:56:26,642 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 23:56:26,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:56:26,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-10 23:56:26,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:56:27,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:27,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:27,151 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-03-10 23:56:27,151 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 [2021-03-10 23:56:27,156 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:27,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:27,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:27,186 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:56:27,187 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 [2021-03-10 23:56:27,194 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:27,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:27,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:27,235 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-03-10 23:56:27,236 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 33 treesize of output 43 [2021-03-10 23:56:27,240 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:27,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:27,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:27,270 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-03-10 23:56:27,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 28 [2021-03-10 23:56:27,272 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:27,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:27,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:27,292 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-10 23:56:27,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-03-10 23:56:27,293 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:27,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:27,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:27,320 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-03-10 23:56:27,321 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 [2021-03-10 23:56:27,323 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:27,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:27,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:27,342 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-10 23:56:27,342 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 [2021-03-10 23:56:27,343 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:27,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:27,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:27,363 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-10 23:56:27,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-03-10 23:56:27,364 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:27,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:27,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:27,384 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-10 23:56:27,384 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 [2021-03-10 23:56:27,385 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:27,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:27,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:27,405 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-10 23:56:27,405 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 [2021-03-10 23:56:27,406 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:27,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:27,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:27,425 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-10 23:56:27,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-03-10 23:56:27,426 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:27,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:27,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:27,454 INFO L354 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2021-03-10 23:56:27,455 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 28 treesize of output 23 [2021-03-10 23:56:27,457 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:27,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:27,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:27,475 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-10 23:56:27,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-03-10 23:56:27,476 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:27,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:27,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:27,493 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-10 23:56:27,493 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 [2021-03-10 23:56:27,494 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:27,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:27,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:27,511 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-10 23:56:27,511 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 [2021-03-10 23:56:27,512 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:27,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:27,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:27,523 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-10 23:56:27,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-03-10 23:56:27,524 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:27,695 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-03-10 23:56:27,695 INFO L628 ElimStorePlain]: treesize reduction 39, result has 73.5 percent of original size [2021-03-10 23:56:27,697 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 23:56:27,697 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:761, output treesize:90 [2021-03-10 23:56:27,803 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:56:27,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:56:27,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-03-10 23:56:27,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514476678] [2021-03-10 23:56:27,804 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 23:56:27,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:56:27,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 23:56:27,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-03-10 23:56:27,804 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) [2021-03-10 23:56:28,371 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2021-03-10 23:56:28,501 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2021-03-10 23:56:29,022 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 67 [2021-03-10 23:56:29,249 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2021-03-10 23:56:29,763 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2021-03-10 23:56:30,018 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 59 [2021-03-10 23:56:30,150 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-03-10 23:56:30,474 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 67 [2021-03-10 23:56:30,937 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 53 [2021-03-10 23:56:31,236 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 58 [2021-03-10 23:56:31,790 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 48 [2021-03-10 23:56:32,058 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 46 [2021-03-10 23:56:32,234 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 42 [2021-03-10 23:56:32,569 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 48 [2021-03-10 23:56:32,816 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 40 [2021-03-10 23:56:33,258 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2021-03-10 23:56:33,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:56:33,545 INFO L93 Difference]: Finished difference Result 3397 states and 10519 transitions. [2021-03-10 23:56:33,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-03-10 23:56:33,546 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 [2021-03-10 23:56:33,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:56:33,551 INFO L225 Difference]: With dead ends: 3397 [2021-03-10 23:56:33,551 INFO L226 Difference]: Without dead ends: 3337 [2021-03-10 23:56:33,551 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1371 ImplicationChecksByTransitivity, 5452.0ms TimeCoverageRelationStatistics Valid=834, Invalid=3456, Unknown=0, NotChecked=0, Total=4290 [2021-03-10 23:56:33,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3337 states. [2021-03-10 23:56:33,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3337 to 1474. [2021-03-10 23:56:33,573 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) [2021-03-10 23:56:33,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 4937 transitions. [2021-03-10 23:56:33,576 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 4937 transitions. Word has length 26 [2021-03-10 23:56:33,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:56:33,576 INFO L480 AbstractCegarLoop]: Abstraction has 1474 states and 4937 transitions. [2021-03-10 23:56:33,576 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) [2021-03-10 23:56:33,576 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 4937 transitions. [2021-03-10 23:56:33,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:56:33,578 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:56:33,578 INFO L519 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] [2021-03-10 23:56:33,779 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable768 [2021-03-10 23:56:33,779 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:56:33,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:56:33,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1882815202, now seen corresponding path program 13 times [2021-03-10 23:56:33,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:56:33,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381725590] [2021-03-10 23:56:33,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:56:33,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:56:34,331 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:56:34,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381725590] [2021-03-10 23:56:34,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243005039] [2021-03-10 23:56:34,332 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 [2021-03-10 23:56:34,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:56:34,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 23:56:34,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:56:34,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:34,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:34,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:34,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-10 23:56:34,746 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:34,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:34,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:34,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:34,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:56:34,753 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:34,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:34,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:34,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:34,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:56:34,760 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:34,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:34,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:34,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:34,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:56:34,767 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:34,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:34,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:34,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:34,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:56:34,774 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:34,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:34,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:34,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:34,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-10 23:56:34,782 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:34,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:34,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:34,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:34,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-10 23:56:34,790 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:34,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:34,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:34,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:34,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-10 23:56:34,797 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:34,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:34,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:34,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:34,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-10 23:56:34,804 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:34,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:34,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:34,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:34,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:56:34,812 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:34,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:34,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:34,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:34,818 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 21 treesize of output 13 [2021-03-10 23:56:34,819 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:34,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:34,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:34,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:34,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-10 23:56:34,826 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:34,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:34,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:34,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:34,833 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 31 treesize of output 19 [2021-03-10 23:56:34,833 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:34,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:34,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:34,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:34,839 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 [2021-03-10 23:56:34,840 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:34,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:34,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:34,844 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 36 treesize of output 19 [2021-03-10 23:56:34,844 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:34,924 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-03-10 23:56:34,926 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 23:56:34,926 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-03-10 23:56:34,980 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:56:34,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:56:34,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 23:56:34,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913951398] [2021-03-10 23:56:34,981 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 23:56:34,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:56:34,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 23:56:34,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-03-10 23:56:34,981 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) [2021-03-10 23:56:35,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:56:35,881 INFO L93 Difference]: Finished difference Result 1857 states and 6096 transitions. [2021-03-10 23:56:35,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 23:56:35,881 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 [2021-03-10 23:56:35,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:56:35,884 INFO L225 Difference]: With dead ends: 1857 [2021-03-10 23:56:35,884 INFO L226 Difference]: Without dead ends: 1842 [2021-03-10 23:56:35,884 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1276.7ms TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2021-03-10 23:56:35,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1842 states. [2021-03-10 23:56:35,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1842 to 1474. [2021-03-10 23:56:35,901 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) [2021-03-10 23:56:35,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 4937 transitions. [2021-03-10 23:56:35,904 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 4937 transitions. Word has length 26 [2021-03-10 23:56:35,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:56:35,904 INFO L480 AbstractCegarLoop]: Abstraction has 1474 states and 4937 transitions. [2021-03-10 23:56:35,904 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) [2021-03-10 23:56:35,904 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 4937 transitions. [2021-03-10 23:56:35,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:56:35,906 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:56:35,906 INFO L519 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] [2021-03-10 23:56:36,106 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable867,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:56:36,107 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:56:36,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:56:36,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1721464722, now seen corresponding path program 14 times [2021-03-10 23:56:36,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:56:36,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116757860] [2021-03-10 23:56:36,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:56:36,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:56:36,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:56:36,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116757860] [2021-03-10 23:56:36,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426620699] [2021-03-10 23:56:36,584 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 [2021-03-10 23:56:36,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:56:36,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:56:36,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-10 23:56:36,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:56:37,238 INFO L354 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2021-03-10 23:56:37,238 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 [2021-03-10 23:56:37,239 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:37,264 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-03-10 23:56:37,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:56:37,266 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:37,437 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-03-10 23:56:37,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:56:37,469 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-03-10 23:56:37,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:56:37,473 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:37,493 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:56:37,493 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 [2021-03-10 23:56:37,500 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:37,662 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-03-10 23:56:37,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:56:37,692 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-03-10 23:56:37,693 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 [2021-03-10 23:56:37,694 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:37,727 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-03-10 23:56:37,727 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 [2021-03-10 23:56:37,731 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:37,898 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-03-10 23:56:37,898 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:56:37,930 INFO L354 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2021-03-10 23:56:37,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:56:37,937 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:37,957 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:56:37,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:56:37,961 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:38,272 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2021-03-10 23:56:38,273 INFO L628 ElimStorePlain]: treesize reduction 17, result has 94.5 percent of original size [2021-03-10 23:56:38,337 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 23:56:38,337 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:365, output treesize:820 [2021-03-10 23:56:38,798 WARN L205 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 78 [2021-03-10 23:56:39,108 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-03-10 23:56:39,248 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:56:39,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:56:39,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-03-10 23:56:39,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478474279] [2021-03-10 23:56:39,249 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 23:56:39,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:56:39,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 23:56:39,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-03-10 23:56:39,249 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) [2021-03-10 23:56:39,430 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 22 [2021-03-10 23:56:39,597 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 28 [2021-03-10 23:56:40,053 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 50 [2021-03-10 23:56:40,662 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 41 [2021-03-10 23:56:40,932 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 39 [2021-03-10 23:56:41,172 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-03-10 23:56:41,651 WARN L205 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 50 [2021-03-10 23:56:42,091 WARN L205 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 62 [2021-03-10 23:56:42,554 WARN L205 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 69 [2021-03-10 23:56:42,958 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 49 [2021-03-10 23:56:43,275 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 47 [2021-03-10 23:56:43,785 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2021-03-10 23:56:44,239 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2021-03-10 23:56:44,851 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 60 [2021-03-10 23:56:45,570 WARN L205 SmtUtils]: Spent 684.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 90 [2021-03-10 23:56:45,913 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 44 [2021-03-10 23:56:46,491 WARN L205 SmtUtils]: Spent 538.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 70 [2021-03-10 23:56:46,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:56:46,586 INFO L93 Difference]: Finished difference Result 2117 states and 6795 transitions. [2021-03-10 23:56:46,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 23:56:46,586 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 [2021-03-10 23:56:46,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:56:46,589 INFO L225 Difference]: With dead ends: 2117 [2021-03-10 23:56:46,590 INFO L226 Difference]: Without dead ends: 2102 [2021-03-10 23:56:46,590 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 7799.4ms TimeCoverageRelationStatistics Valid=280, Invalid=1526, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 23:56:46,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2102 states. [2021-03-10 23:56:46,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2102 to 1478. [2021-03-10 23:56:46,613 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) [2021-03-10 23:56:46,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1478 states to 1478 states and 4958 transitions. [2021-03-10 23:56:46,616 INFO L78 Accepts]: Start accepts. Automaton has 1478 states and 4958 transitions. Word has length 26 [2021-03-10 23:56:46,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:56:46,616 INFO L480 AbstractCegarLoop]: Abstraction has 1478 states and 4958 transitions. [2021-03-10 23:56:46,616 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) [2021-03-10 23:56:46,616 INFO L276 IsEmpty]: Start isEmpty. Operand 1478 states and 4958 transitions. [2021-03-10 23:56:46,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:56:46,620 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:56:46,620 INFO L519 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] [2021-03-10 23:56:46,835 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable897,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:56:46,835 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:56:46,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:56:46,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1741432748, now seen corresponding path program 15 times [2021-03-10 23:56:46,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:56:46,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590181442] [2021-03-10 23:56:46,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:56:46,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:56:47,283 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:56:47,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590181442] [2021-03-10 23:56:47,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981686434] [2021-03-10 23:56:47,283 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 [2021-03-10 23:56:47,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:56:47,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:56:47,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 23:56:47,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:56:47,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:47,653 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 23:56:47,654 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 [2021-03-10 23:56:47,654 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:47,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:47,675 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:56:47,675 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 [2021-03-10 23:56:47,680 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:47,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:47,693 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-10 23:56:47,693 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 [2021-03-10 23:56:47,695 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:47,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:47,704 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 23:56:47,704 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 [2021-03-10 23:56:47,705 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:47,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:47,717 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:56:47,718 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 [2021-03-10 23:56:47,719 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:47,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:47,728 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 23:56:47,728 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 [2021-03-10 23:56:47,729 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:47,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:47,742 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-10 23:56:47,742 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 [2021-03-10 23:56:47,744 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:47,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:47,753 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 23:56:47,753 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 [2021-03-10 23:56:47,754 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:47,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:47,763 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 23:56:47,763 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 [2021-03-10 23:56:47,764 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:47,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:47,777 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:56:47,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:56:47,778 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:47,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:47,791 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-10 23:56:47,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:56:47,793 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:47,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:47,808 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:56:47,808 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 [2021-03-10 23:56:47,812 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:47,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:47,822 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 23:56:47,822 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 [2021-03-10 23:56:47,823 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:47,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:47,835 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:56:47,835 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 [2021-03-10 23:56:47,837 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:47,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:47,846 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 23:56:47,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:56:47,847 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:47,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:47,853 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 23:56:47,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:56:47,854 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:47,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:56:47,947 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 23:56:47,948 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:657, output treesize:174 [2021-03-10 23:56:48,168 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:56:48,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:56:48,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-03-10 23:56:48,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293744779] [2021-03-10 23:56:48,169 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 23:56:48,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:56:48,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 23:56:48,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-03-10 23:56:48,169 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) [2021-03-10 23:56:48,942 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2021-03-10 23:56:49,126 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 40 [2021-03-10 23:56:49,271 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 35 [2021-03-10 23:56:49,451 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2021-03-10 23:56:49,688 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2021-03-10 23:56:50,223 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2021-03-10 23:56:50,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:56:50,283 INFO L93 Difference]: Finished difference Result 2018 states and 6612 transitions. [2021-03-10 23:56:50,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 23:56:50,284 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 [2021-03-10 23:56:50,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:56:50,287 INFO L225 Difference]: With dead ends: 2018 [2021-03-10 23:56:50,287 INFO L226 Difference]: Without dead ends: 2003 [2021-03-10 23:56:50,287 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 2421.2ms TimeCoverageRelationStatistics Valid=185, Invalid=807, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:56:50,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2003 states. [2021-03-10 23:56:50,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2003 to 1475. [2021-03-10 23:56:50,303 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) [2021-03-10 23:56:50,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1475 states to 1475 states and 4943 transitions. [2021-03-10 23:56:50,305 INFO L78 Accepts]: Start accepts. Automaton has 1475 states and 4943 transitions. Word has length 26 [2021-03-10 23:56:50,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:56:50,306 INFO L480 AbstractCegarLoop]: Abstraction has 1475 states and 4943 transitions. [2021-03-10 23:56:50,306 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) [2021-03-10 23:56:50,306 INFO L276 IsEmpty]: Start isEmpty. Operand 1475 states and 4943 transitions. [2021-03-10 23:56:50,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:56:50,308 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:56:50,308 INFO L519 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] [2021-03-10 23:56:50,508 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable977,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:56:50,508 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:56:50,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:56:50,508 INFO L82 PathProgramCache]: Analyzing trace with hash 9265186, now seen corresponding path program 16 times [2021-03-10 23:56:50,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:56:50,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030943697] [2021-03-10 23:56:50,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:56:50,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:56:50,987 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:56:50,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030943697] [2021-03-10 23:56:50,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051807865] [2021-03-10 23:56:50,987 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 [2021-03-10 23:56:51,008 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:56:51,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:56:51,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 23:56:51,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:56:51,353 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-10 23:56:51,573 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 55 [2021-03-10 23:56:51,646 INFO L446 ElimStorePlain]: Different costs {1=[A], 2=[v_prenex_46, v_prenex_45]} [2021-03-10 23:56:51,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:51,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-10 23:56:51,652 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:51,778 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-03-10 23:56:51,778 INFO L628 ElimStorePlain]: treesize reduction 54, result has 69.8 percent of original size [2021-03-10 23:56:51,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:51,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:51,782 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 28 treesize of output 16 [2021-03-10 23:56:51,783 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:51,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:56:51,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:51,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:51,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:51,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:56:51,843 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:51,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:51,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:56:51,847 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 21 treesize of output 13 [2021-03-10 23:56:51,848 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:51,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:56:51,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 23:56:51,892 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:193, output treesize:51 [2021-03-10 23:56:51,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:56:51,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:56:51,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 23:56:51,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614074855] [2021-03-10 23:56:51,958 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 23:56:51,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:56:51,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 23:56:51,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-03-10 23:56:51,958 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) [2021-03-10 23:56:52,264 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2021-03-10 23:56:52,651 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 42 [2021-03-10 23:56:53,205 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-03-10 23:56:53,638 WARN L205 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 64 [2021-03-10 23:56:54,019 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 64 [2021-03-10 23:56:54,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:56:54,204 INFO L93 Difference]: Finished difference Result 2004 states and 6582 transitions. [2021-03-10 23:56:54,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 23:56:54,205 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 [2021-03-10 23:56:54,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:56:54,207 INFO L225 Difference]: With dead ends: 2004 [2021-03-10 23:56:54,207 INFO L226 Difference]: Without dead ends: 1989 [2021-03-10 23:56:54,208 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 2619.5ms TimeCoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:56:54,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1989 states. [2021-03-10 23:56:54,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1989 to 1478. [2021-03-10 23:56:54,230 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) [2021-03-10 23:56:54,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1478 states to 1478 states and 4955 transitions. [2021-03-10 23:56:54,233 INFO L78 Accepts]: Start accepts. Automaton has 1478 states and 4955 transitions. Word has length 26 [2021-03-10 23:56:54,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:56:54,233 INFO L480 AbstractCegarLoop]: Abstraction has 1478 states and 4955 transitions. [2021-03-10 23:56:54,233 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) [2021-03-10 23:56:54,233 INFO L276 IsEmpty]: Start isEmpty. Operand 1478 states and 4955 transitions. [2021-03-10 23:56:54,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:56:54,235 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:56:54,235 INFO L519 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] [2021-03-10 23:56:54,435 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1018,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:56:54,436 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:56:54,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:56:54,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1608267594, now seen corresponding path program 17 times [2021-03-10 23:56:54,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:56:54,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128881547] [2021-03-10 23:56:54,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:56:54,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:56:54,786 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2021-03-10 23:56:54,859 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:56:54,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128881547] [2021-03-10 23:56:54,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963722980] [2021-03-10 23:56:54,859 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:56:54,878 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 23:56:54,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:56:54,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-10 23:56:54,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:56:55,257 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-10 23:56:55,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:55,323 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-10 23:56:55,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:56:55,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:55,479 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-03-10 23:56:55,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:56:55,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:55,494 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:56:55,494 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 [2021-03-10 23:56:55,495 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:55,624 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-03-10 23:56:55,624 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:56:55,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:55,638 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-10 23:56:55,638 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 [2021-03-10 23:56:55,640 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:55,765 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-03-10 23:56:55,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:56:55,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:55,780 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-10 23:56:55,780 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 [2021-03-10 23:56:55,781 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:55,901 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-03-10 23:56:55,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:56:55,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:55,914 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:56:55,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:56:55,918 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:56,033 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-03-10 23:56:56,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:56:56,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:56,046 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:56:56,046 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 [2021-03-10 23:56:56,051 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:56,161 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-03-10 23:56:56,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:56:56,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:56,173 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:56:56,173 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 [2021-03-10 23:56:56,176 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:56,282 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-03-10 23:56:56,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:56:56,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:56:56,298 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:56:56,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:56:56,300 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 23:56:56,402 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-03-10 23:56:56,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:56:56,409 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 23:56:56,409 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:309, output treesize:174 [2021-03-10 23:56:56,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:56:56,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:56:56,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 23:56:56,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258754941] [2021-03-10 23:56:56,626 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 23:56:56,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:56:56,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 23:56:56,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-03-10 23:56:56,626 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) [2021-03-10 23:56:57,099 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 38 [2021-03-10 23:56:57,233 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 40 [2021-03-10 23:56:57,613 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 41 [2021-03-10 23:56:57,876 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 54 [2021-03-10 23:56:58,135 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 47 [2021-03-10 23:56:58,377 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 45 [2021-03-10 23:56:58,562 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-03-10 23:56:59,012 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-03-10 23:56:59,686 WARN L205 SmtUtils]: Spent 632.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 64 [2021-03-10 23:57:00,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:57:00,175 INFO L93 Difference]: Finished difference Result 2074 states and 6746 transitions. [2021-03-10 23:57:00,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 23:57:00,175 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 [2021-03-10 23:57:00,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:57:00,178 INFO L225 Difference]: With dead ends: 2074 [2021-03-10 23:57:00,178 INFO L226 Difference]: Without dead ends: 2044 [2021-03-10 23:57:00,178 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 3770.9ms TimeCoverageRelationStatistics Valid=274, Invalid=1286, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 23:57:00,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2044 states. [2021-03-10 23:57:00,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2044 to 1472. [2021-03-10 23:57:00,194 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) [2021-03-10 23:57:00,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1472 states to 1472 states and 4931 transitions. [2021-03-10 23:57:00,197 INFO L78 Accepts]: Start accepts. Automaton has 1472 states and 4931 transitions. Word has length 26 [2021-03-10 23:57:00,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:57:00,197 INFO L480 AbstractCegarLoop]: Abstraction has 1472 states and 4931 transitions. [2021-03-10 23:57:00,197 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) [2021-03-10 23:57:00,197 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states and 4931 transitions. [2021-03-10 23:57:00,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:57:00,199 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:57:00,199 INFO L519 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] [2021-03-10 23:57:00,399 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1027 [2021-03-10 23:57:00,400 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:57:00,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:57:00,400 INFO L82 PathProgramCache]: Analyzing trace with hash -2091148486, now seen corresponding path program 18 times [2021-03-10 23:57:00,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:57:00,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107887199] [2021-03-10 23:57:00,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:57:00,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:57:00,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:57:00,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107887199] [2021-03-10 23:57:00,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465196546] [2021-03-10 23:57:00,846 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 [2021-03-10 23:57:00,867 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:57:00,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:57:00,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-10 23:57:00,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:57:01,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:01,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:01,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:01,304 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 33 treesize of output 19 [2021-03-10 23:57:01,305 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:01,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:01,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:01,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:01,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-10 23:57:01,313 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:01,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:01,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:01,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:01,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:57:01,320 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:01,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:01,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:01,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:01,327 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 33 treesize of output 19 [2021-03-10 23:57:01,328 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:01,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:01,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:01,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:01,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:57:01,337 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:01,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:01,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:01,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:01,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:57:01,345 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:01,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:01,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:01,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:01,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-10 23:57:01,353 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:01,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:01,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:01,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:01,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-03-10 23:57:01,361 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:01,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:01,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:01,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:01,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-10 23:57:01,369 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:01,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:01,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:01,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:01,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-10 23:57:01,378 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:01,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:01,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:01,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:01,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:57:01,396 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:01,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:01,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:01,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:01,405 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 [2021-03-10 23:57:01,406 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:01,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:01,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:01,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:01,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-10 23:57:01,414 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:01,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:01,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:01,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:01,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-10 23:57:01,422 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:01,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:01,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:01,426 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 [2021-03-10 23:57:01,427 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:01,512 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-03-10 23:57:01,513 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 23:57:01,513 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-03-10 23:57:01,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:57:01,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:57:01,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-03-10 23:57:01,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232829078] [2021-03-10 23:57:01,577 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 23:57:01,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:57:01,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 23:57:01,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-03-10 23:57:01,577 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) [2021-03-10 23:57:02,706 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-03-10 23:57:02,870 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-03-10 23:57:03,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:57:03,167 INFO L93 Difference]: Finished difference Result 1963 states and 6392 transitions. [2021-03-10 23:57:03,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 23:57:03,168 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 [2021-03-10 23:57:03,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:57:03,171 INFO L225 Difference]: With dead ends: 1963 [2021-03-10 23:57:03,171 INFO L226 Difference]: Without dead ends: 1938 [2021-03-10 23:57:03,171 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1793.2ms TimeCoverageRelationStatistics Valid=185, Invalid=871, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 23:57:03,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1938 states. [2021-03-10 23:57:03,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1938 to 1507. [2021-03-10 23:57:03,187 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) [2021-03-10 23:57:03,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1507 states to 1507 states and 5042 transitions. [2021-03-10 23:57:03,190 INFO L78 Accepts]: Start accepts. Automaton has 1507 states and 5042 transitions. Word has length 26 [2021-03-10 23:57:03,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:57:03,190 INFO L480 AbstractCegarLoop]: Abstraction has 1507 states and 5042 transitions. [2021-03-10 23:57:03,190 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) [2021-03-10 23:57:03,190 INFO L276 IsEmpty]: Start isEmpty. Operand 1507 states and 5042 transitions. [2021-03-10 23:57:03,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:57:03,192 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:57:03,192 INFO L519 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] [2021-03-10 23:57:03,407 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1042,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:57:03,407 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:57:03,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:57:03,407 INFO L82 PathProgramCache]: Analyzing trace with hash -31506310, now seen corresponding path program 19 times [2021-03-10 23:57:03,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:57:03,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028080571] [2021-03-10 23:57:03,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:57:03,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:57:03,815 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:57:03,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028080571] [2021-03-10 23:57:03,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175176791] [2021-03-10 23:57:03,816 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 [2021-03-10 23:57:03,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:57:03,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 23:57:03,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:57:04,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:04,146 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 23:57:04,146 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 [2021-03-10 23:57:04,147 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:04,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:04,161 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:57:04,161 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 [2021-03-10 23:57:04,166 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:04,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:04,180 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:57:04,181 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 [2021-03-10 23:57:04,186 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:04,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:04,196 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 23:57:04,196 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 [2021-03-10 23:57:04,197 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:04,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:04,211 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-10 23:57:04,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:57:04,213 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:04,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:04,227 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-10 23:57:04,227 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 [2021-03-10 23:57:04,229 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:04,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:04,244 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-10 23:57:04,244 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 [2021-03-10 23:57:04,246 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:04,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:04,257 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 23:57:04,257 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 [2021-03-10 23:57:04,258 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:04,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:04,269 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 23:57:04,269 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 33 treesize of output 19 [2021-03-10 23:57:04,270 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:04,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:04,283 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 23:57:04,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:57:04,284 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:04,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:04,296 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 23:57:04,296 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 [2021-03-10 23:57:04,297 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:04,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:04,308 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 23:57:04,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:57:04,309 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:04,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:04,322 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:57:04,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:57:04,324 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:04,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:04,337 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:57:04,338 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 [2021-03-10 23:57:04,340 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:04,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:04,351 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 23:57:04,351 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 [2021-03-10 23:57:04,352 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:04,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:04,362 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:57:04,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:57:04,364 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:04,460 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:57:04,465 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 23:57:04,465 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:689, output treesize:174 [2021-03-10 23:57:04,687 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:57:04,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:57:04,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 23:57:04,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651596421] [2021-03-10 23:57:04,688 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 23:57:04,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:57:04,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 23:57:04,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-03-10 23:57:04,688 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) [2021-03-10 23:57:04,881 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 28 [2021-03-10 23:57:06,237 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2021-03-10 23:57:06,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:57:06,432 INFO L93 Difference]: Finished difference Result 2180 states and 7083 transitions. [2021-03-10 23:57:06,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 23:57:06,433 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 [2021-03-10 23:57:06,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:57:06,436 INFO L225 Difference]: With dead ends: 2180 [2021-03-10 23:57:06,436 INFO L226 Difference]: Without dead ends: 2155 [2021-03-10 23:57:06,436 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 1873.7ms TimeCoverageRelationStatistics Valid=223, Invalid=833, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 23:57:06,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2155 states. [2021-03-10 23:57:06,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2155 to 1510. [2021-03-10 23:57:06,453 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) [2021-03-10 23:57:06,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1510 states to 1510 states and 5053 transitions. [2021-03-10 23:57:06,456 INFO L78 Accepts]: Start accepts. Automaton has 1510 states and 5053 transitions. Word has length 26 [2021-03-10 23:57:06,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:57:06,456 INFO L480 AbstractCegarLoop]: Abstraction has 1510 states and 5053 transitions. [2021-03-10 23:57:06,456 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) [2021-03-10 23:57:06,456 INFO L276 IsEmpty]: Start isEmpty. Operand 1510 states and 5053 transitions. [2021-03-10 23:57:06,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:57:06,458 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:57:06,458 INFO L519 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] [2021-03-10 23:57:06,667 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1072 [2021-03-10 23:57:06,667 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:57:06,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:57:06,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1960184130, now seen corresponding path program 20 times [2021-03-10 23:57:06,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:57:06,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285619833] [2021-03-10 23:57:06,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:57:06,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:57:06,852 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2021-03-10 23:57:07,159 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:57:07,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285619833] [2021-03-10 23:57:07,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308958073] [2021-03-10 23:57:07,159 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 [2021-03-10 23:57:07,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:57:07,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:57:07,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 23:57:07,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:57:07,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:07,585 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:57:07,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:57:07,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:07,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:07,599 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-10 23:57:07,599 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 [2021-03-10 23:57:07,601 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:07,748 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-03-10 23:57:07,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:57:07,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:07,764 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-10 23:57:07,764 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 [2021-03-10 23:57:07,765 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:07,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:07,776 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:57:07,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:57:07,781 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:07,914 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-03-10 23:57:07,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:57:07,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:07,928 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:57:07,928 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 16 treesize of output 18 [2021-03-10 23:57:07,933 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:07,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:07,945 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-10 23:57:07,945 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 [2021-03-10 23:57:07,947 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:08,066 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-03-10 23:57:08,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:57:08,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:08,080 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:57:08,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-03-10 23:57:08,082 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:08,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:08,093 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:57:08,093 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 27 [2021-03-10 23:57:08,096 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:08,206 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-03-10 23:57:08,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:57:08,212 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 23:57:08,212 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:309, output treesize:174 [2021-03-10 23:57:08,439 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:57:08,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:57:08,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-03-10 23:57:08,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745358789] [2021-03-10 23:57:08,440 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 23:57:08,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:57:08,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 23:57:08,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-03-10 23:57:08,440 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) [2021-03-10 23:57:09,348 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-03-10 23:57:09,656 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2021-03-10 23:57:09,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:57:09,735 INFO L93 Difference]: Finished difference Result 1689 states and 5564 transitions. [2021-03-10 23:57:09,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 23:57:09,736 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 [2021-03-10 23:57:09,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:57:09,738 INFO L225 Difference]: With dead ends: 1689 [2021-03-10 23:57:09,738 INFO L226 Difference]: Without dead ends: 1664 [2021-03-10 23:57:09,739 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1729.6ms TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2021-03-10 23:57:09,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1664 states. [2021-03-10 23:57:09,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1664 to 1523. [2021-03-10 23:57:09,754 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) [2021-03-10 23:57:09,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1523 states to 1523 states and 5106 transitions. [2021-03-10 23:57:09,773 INFO L78 Accepts]: Start accepts. Automaton has 1523 states and 5106 transitions. Word has length 26 [2021-03-10 23:57:09,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:57:09,773 INFO L480 AbstractCegarLoop]: Abstraction has 1523 states and 5106 transitions. [2021-03-10 23:57:09,774 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) [2021-03-10 23:57:09,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1523 states and 5106 transitions. [2021-03-10 23:57:09,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:57:09,776 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:57:09,776 INFO L519 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] [2021-03-10 23:57:09,976 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1109,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:57:09,977 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:57:09,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:57:09,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1800748254, now seen corresponding path program 21 times [2021-03-10 23:57:09,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:57:09,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978920616] [2021-03-10 23:57:09,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:57:09,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:57:10,281 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 34 [2021-03-10 23:57:10,502 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:57:10,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978920616] [2021-03-10 23:57:10,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590805584] [2021-03-10 23:57:10,502 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 [2021-03-10 23:57:10,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:57:10,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:57:10,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-10 23:57:10,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:57:10,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:10,798 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 23:57:10,798 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 28 treesize of output 16 [2021-03-10 23:57:10,799 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:10,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:10,808 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 23:57:10,808 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 [2021-03-10 23:57:10,809 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:10,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:10,823 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-10 23:57:10,823 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 [2021-03-10 23:57:10,825 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:10,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:10,835 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 23:57:10,835 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 [2021-03-10 23:57:10,836 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:10,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:10,850 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:57:10,850 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 [2021-03-10 23:57:10,851 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:10,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:10,865 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-10 23:57:10,865 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 [2021-03-10 23:57:10,867 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:10,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:10,878 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 23:57:10,878 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 [2021-03-10 23:57:10,879 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:10,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:10,892 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:57:10,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:57:10,894 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:10,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:10,905 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 23:57:10,905 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 [2021-03-10 23:57:10,906 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:10,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:10,920 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:57:10,921 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 [2021-03-10 23:57:10,925 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:10,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:10,936 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 23:57:10,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:57:10,937 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:10,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:10,950 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:57:10,950 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 [2021-03-10 23:57:10,953 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:10,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:10,967 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-10 23:57:10,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:57:10,970 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:10,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:10,982 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:57:10,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:57:10,987 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:10,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:10,997 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 23:57:10,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:57:10,998 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:11,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:11,005 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 23:57:11,005 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 [2021-03-10 23:57:11,006 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:11,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:57:11,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 23:57:11,104 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-03-10 23:57:11,329 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:57:11,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:57:11,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-03-10 23:57:11,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787729328] [2021-03-10 23:57:11,329 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 23:57:11,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:57:11,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 23:57:11,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-03-10 23:57:11,330 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) [2021-03-10 23:57:12,048 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 43 [2021-03-10 23:57:12,669 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2021-03-10 23:57:12,869 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 43 [2021-03-10 23:57:13,149 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-03-10 23:57:13,439 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-03-10 23:57:13,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:57:13,543 INFO L93 Difference]: Finished difference Result 2055 states and 6753 transitions. [2021-03-10 23:57:13,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 23:57:13,544 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 [2021-03-10 23:57:13,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:57:13,547 INFO L225 Difference]: With dead ends: 2055 [2021-03-10 23:57:13,547 INFO L226 Difference]: Without dead ends: 2036 [2021-03-10 23:57:13,547 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 2498.5ms TimeCoverageRelationStatistics Valid=191, Invalid=931, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 23:57:13,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2036 states. [2021-03-10 23:57:13,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2036 to 1535. [2021-03-10 23:57:13,564 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) [2021-03-10 23:57:13,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 5151 transitions. [2021-03-10 23:57:13,567 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 5151 transitions. Word has length 26 [2021-03-10 23:57:13,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:57:13,567 INFO L480 AbstractCegarLoop]: Abstraction has 1535 states and 5151 transitions. [2021-03-10 23:57:13,567 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) [2021-03-10 23:57:13,567 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 5151 transitions. [2021-03-10 23:57:13,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:57:13,569 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:57:13,569 INFO L519 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] [2021-03-10 23:57:13,771 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1140,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:57:13,771 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:57:13,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:57:13,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1506727430, now seen corresponding path program 22 times [2021-03-10 23:57:13,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:57:13,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661784264] [2021-03-10 23:57:13,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:57:13,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:57:14,160 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-03-10 23:57:14,264 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:57:14,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661784264] [2021-03-10 23:57:14,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029741909] [2021-03-10 23:57:14,264 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 [2021-03-10 23:57:14,284 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:57:14,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:57:14,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 23:57:14,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:57:14,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:14,748 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:57:14,749 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 [2021-03-10 23:57:14,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:14,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:14,765 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-10 23:57:14,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:57:14,768 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:14,930 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-03-10 23:57:14,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:57:14,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:14,945 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:57:14,945 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 [2021-03-10 23:57:14,949 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:14,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:14,963 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-10 23:57:14,963 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 [2021-03-10 23:57:14,965 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:15,120 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-03-10 23:57:15,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:57:15,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:15,135 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:57:15,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:57:15,138 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:15,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:15,150 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:57:15,150 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 [2021-03-10 23:57:15,151 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:15,289 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-03-10 23:57:15,290 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:57:15,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:15,304 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-10 23:57:15,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:57:15,306 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:15,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:15,316 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:57:15,316 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 [2021-03-10 23:57:15,321 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:15,443 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-03-10 23:57:15,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:57:15,449 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 23:57:15,450 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:325, output treesize:174 [2021-03-10 23:57:15,676 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:57:15,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:57:15,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 23:57:15,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597614339] [2021-03-10 23:57:15,676 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 23:57:15,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:57:15,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 23:57:15,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-03-10 23:57:15,677 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) [2021-03-10 23:57:15,841 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 28 [2021-03-10 23:57:16,322 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2021-03-10 23:57:16,517 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-03-10 23:57:17,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:57:17,091 INFO L93 Difference]: Finished difference Result 2036 states and 6692 transitions. [2021-03-10 23:57:17,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 23:57:17,092 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 [2021-03-10 23:57:17,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:57:17,095 INFO L225 Difference]: With dead ends: 2036 [2021-03-10 23:57:17,095 INFO L226 Difference]: Without dead ends: 2011 [2021-03-10 23:57:17,095 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1790.7ms TimeCoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2021-03-10 23:57:17,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2011 states. [2021-03-10 23:57:17,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2011 to 1541. [2021-03-10 23:57:17,111 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) [2021-03-10 23:57:17,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1541 states to 1541 states and 5169 transitions. [2021-03-10 23:57:17,114 INFO L78 Accepts]: Start accepts. Automaton has 1541 states and 5169 transitions. Word has length 26 [2021-03-10 23:57:17,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:57:17,114 INFO L480 AbstractCegarLoop]: Abstraction has 1541 states and 5169 transitions. [2021-03-10 23:57:17,114 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) [2021-03-10 23:57:17,114 INFO L276 IsEmpty]: Start isEmpty. Operand 1541 states and 5169 transitions. [2021-03-10 23:57:17,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:57:17,116 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:57:17,116 INFO L519 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] [2021-03-10 23:57:17,316 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1157,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:57:17,316 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:57:17,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:57:17,317 INFO L82 PathProgramCache]: Analyzing trace with hash -132958662, now seen corresponding path program 42 times [2021-03-10 23:57:17,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:57:17,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591586171] [2021-03-10 23:57:17,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:57:17,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:57:17,831 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:57:17,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591586171] [2021-03-10 23:57:17,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017557460] [2021-03-10 23:57:17,832 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 [2021-03-10 23:57:17,851 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:57:17,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:57:17,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-10 23:57:17,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:57:18,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:18,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:18,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:18,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:18,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:18,437 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 [2021-03-10 23:57:18,438 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:18,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:18,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:18,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:18,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:18,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:18,448 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 [2021-03-10 23:57:18,449 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:18,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:18,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:18,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:18,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:18,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:18,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-03-10 23:57:18,460 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:18,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:18,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:18,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:18,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:18,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:18,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-03-10 23:57:18,473 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:18,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:18,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:18,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:18,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:18,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:18,484 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 [2021-03-10 23:57:18,486 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:18,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:18,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:18,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:18,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:18,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:18,495 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 [2021-03-10 23:57:18,496 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:18,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:18,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:18,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:18,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:18,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:18,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-03-10 23:57:18,513 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:18,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:18,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:18,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:18,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:18,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:18,523 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 [2021-03-10 23:57:18,524 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:18,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:18,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:18,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:18,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:18,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:18,532 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 [2021-03-10 23:57:18,533 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:18,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:18,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:18,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:18,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:18,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:18,541 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 [2021-03-10 23:57:18,542 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:18,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:18,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:18,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:18,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:18,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:18,551 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 [2021-03-10 23:57:18,552 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:18,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:18,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:18,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:18,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:18,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:18,562 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 [2021-03-10 23:57:18,562 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:18,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:18,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:18,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:18,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:18,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:18,586 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 [2021-03-10 23:57:18,587 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:18,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:18,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:18,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:18,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:18,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:18,595 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 33 treesize of output 13 [2021-03-10 23:57:18,597 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:18,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:18,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:18,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:18,602 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 [2021-03-10 23:57:18,603 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:18,634 INFO L628 ElimStorePlain]: treesize reduction 16, result has 62.8 percent of original size [2021-03-10 23:57:18,635 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:57:18,635 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-03-10 23:57:18,671 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:57:18,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:57:18,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-03-10 23:57:18,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779504503] [2021-03-10 23:57:18,672 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 23:57:18,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:57:18,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 23:57:18,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-03-10 23:57:18,672 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) [2021-03-10 23:57:19,984 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-03-10 23:57:20,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:57:20,065 INFO L93 Difference]: Finished difference Result 1988 states and 6491 transitions. [2021-03-10 23:57:20,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 23:57:20,066 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 [2021-03-10 23:57:20,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:57:20,069 INFO L225 Difference]: With dead ends: 1988 [2021-03-10 23:57:20,069 INFO L226 Difference]: Without dead ends: 1962 [2021-03-10 23:57:20,069 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1756.0ms TimeCoverageRelationStatistics Valid=246, Invalid=1014, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 23:57:20,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1962 states. [2021-03-10 23:57:20,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1962 to 1545. [2021-03-10 23:57:20,085 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) [2021-03-10 23:57:20,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1545 states to 1545 states and 5179 transitions. [2021-03-10 23:57:20,087 INFO L78 Accepts]: Start accepts. Automaton has 1545 states and 5179 transitions. Word has length 26 [2021-03-10 23:57:20,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:57:20,087 INFO L480 AbstractCegarLoop]: Abstraction has 1545 states and 5179 transitions. [2021-03-10 23:57:20,087 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) [2021-03-10 23:57:20,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1545 states and 5179 transitions. [2021-03-10 23:57:20,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:57:20,089 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:57:20,089 INFO L519 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] [2021-03-10 23:57:20,295 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1189 [2021-03-10 23:57:20,295 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:57:20,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:57:20,295 INFO L82 PathProgramCache]: Analyzing trace with hash 934915902, now seen corresponding path program 43 times [2021-03-10 23:57:20,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:57:20,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543249526] [2021-03-10 23:57:20,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:57:20,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:57:20,750 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:57:20,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543249526] [2021-03-10 23:57:20,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674092970] [2021-03-10 23:57:20,750 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 [2021-03-10 23:57:20,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:57:20,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-10 23:57:20,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:57:21,162 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-03-10 23:57:21,242 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_75, v_prenex_77], 6=[A, v_prenex_73]} [2021-03-10 23:57:21,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:21,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:21,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:21,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-10 23:57:21,257 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:21,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:21,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:21,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-10 23:57:21,267 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:21,409 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2021-03-10 23:57:21,410 INFO L628 ElimStorePlain]: treesize reduction 168, result has 46.7 percent of original size [2021-03-10 23:57:21,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:21,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:21,415 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 25 treesize of output 13 [2021-03-10 23:57:21,416 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:21,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:57:21,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:21,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:21,469 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 29 treesize of output 13 [2021-03-10 23:57:21,484 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:21,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:57:21,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:21,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:21,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:21,537 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 29 treesize of output 13 [2021-03-10 23:57:21,538 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:21,577 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:57:21,579 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 23:57:21,579 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:381, output treesize:55 [2021-03-10 23:57:21,650 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:57:21,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:57:21,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-03-10 23:57:21,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013900429] [2021-03-10 23:57:21,651 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 23:57:21,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:57:21,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 23:57:21,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-03-10 23:57:21,651 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) [2021-03-10 23:57:22,918 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 41 [2021-03-10 23:57:23,876 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-03-10 23:57:24,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:57:24,094 INFO L93 Difference]: Finished difference Result 2157 states and 7044 transitions. [2021-03-10 23:57:24,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 23:57:24,094 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 [2021-03-10 23:57:24,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:57:24,098 INFO L225 Difference]: With dead ends: 2157 [2021-03-10 23:57:24,098 INFO L226 Difference]: Without dead ends: 2142 [2021-03-10 23:57:24,098 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 2594.3ms TimeCoverageRelationStatistics Valid=362, Invalid=1530, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 23:57:24,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2142 states. [2021-03-10 23:57:24,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2142 to 1545. [2021-03-10 23:57:24,116 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) [2021-03-10 23:57:24,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1545 states to 1545 states and 5179 transitions. [2021-03-10 23:57:24,118 INFO L78 Accepts]: Start accepts. Automaton has 1545 states and 5179 transitions. Word has length 26 [2021-03-10 23:57:24,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:57:24,118 INFO L480 AbstractCegarLoop]: Abstraction has 1545 states and 5179 transitions. [2021-03-10 23:57:24,119 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) [2021-03-10 23:57:24,119 INFO L276 IsEmpty]: Start isEmpty. Operand 1545 states and 5179 transitions. [2021-03-10 23:57:24,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:57:24,120 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:57:24,120 INFO L519 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] [2021-03-10 23:57:24,321 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1279 [2021-03-10 23:57:24,321 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:57:24,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:57:24,321 INFO L82 PathProgramCache]: Analyzing trace with hash 346540478, now seen corresponding path program 23 times [2021-03-10 23:57:24,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:57:24,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175515573] [2021-03-10 23:57:24,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:57:24,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:57:24,514 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2021-03-10 23:57:24,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:57:24,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175515573] [2021-03-10 23:57:24,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52483963] [2021-03-10 23:57:24,912 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 [2021-03-10 23:57:24,931 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 23:57:24,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:57:24,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-10 23:57:24,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:57:25,414 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-03-10 23:57:25,683 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-03-10 23:57:25,998 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 57 [2021-03-10 23:57:26,047 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_87, v_prenex_88], 2=[A, v_prenex_86]} [2021-03-10 23:57:26,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:26,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 23:57:26,055 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:26,226 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-03-10 23:57:26,227 INFO L628 ElimStorePlain]: treesize reduction 54, result has 73.1 percent of original size [2021-03-10 23:57:26,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:26,232 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 [2021-03-10 23:57:26,233 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:26,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:57:26,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:26,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:26,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:26,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-10 23:57:26,313 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:26,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:26,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:26,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:57:26,320 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:26,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:57:26,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:26,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:26,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-10 23:57:26,385 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:26,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:57:26,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 23:57:26,437 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:211, output treesize:51 [2021-03-10 23:57:26,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:57:26,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:57:26,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 23:57:26,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416370457] [2021-03-10 23:57:26,511 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 23:57:26,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:57:26,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 23:57:26,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-03-10 23:57:26,511 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) [2021-03-10 23:57:27,187 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-03-10 23:57:27,363 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2021-03-10 23:57:27,650 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2021-03-10 23:57:28,343 WARN L205 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 81 [2021-03-10 23:57:28,969 WARN L205 SmtUtils]: Spent 577.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 78 [2021-03-10 23:57:29,579 WARN L205 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 76 [2021-03-10 23:57:29,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:57:29,737 INFO L93 Difference]: Finished difference Result 2023 states and 6590 transitions. [2021-03-10 23:57:29,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 23:57:29,737 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 [2021-03-10 23:57:29,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:57:29,740 INFO L225 Difference]: With dead ends: 2023 [2021-03-10 23:57:29,740 INFO L226 Difference]: Without dead ends: 2008 [2021-03-10 23:57:29,740 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 4058.3ms TimeCoverageRelationStatistics Valid=203, Invalid=789, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:57:29,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2008 states. [2021-03-10 23:57:29,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2008 to 1556. [2021-03-10 23:57:29,756 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) [2021-03-10 23:57:29,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1556 states to 1556 states and 5217 transitions. [2021-03-10 23:57:29,759 INFO L78 Accepts]: Start accepts. Automaton has 1556 states and 5217 transitions. Word has length 26 [2021-03-10 23:57:29,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:57:29,759 INFO L480 AbstractCegarLoop]: Abstraction has 1556 states and 5217 transitions. [2021-03-10 23:57:29,759 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) [2021-03-10 23:57:29,759 INFO L276 IsEmpty]: Start isEmpty. Operand 1556 states and 5217 transitions. [2021-03-10 23:57:29,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:57:29,761 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:57:29,761 INFO L519 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] [2021-03-10 23:57:29,961 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1293,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:57:29,961 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:57:29,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:57:29,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1896922042, now seen corresponding path program 44 times [2021-03-10 23:57:29,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:57:29,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282462963] [2021-03-10 23:57:29,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:57:29,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:57:30,354 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 31 [2021-03-10 23:57:30,648 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:57:30,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282462963] [2021-03-10 23:57:30,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039539031] [2021-03-10 23:57:30,648 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 [2021-03-10 23:57:30,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:57:30,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:57:30,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 23:57:30,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:57:31,108 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-03-10 23:57:31,639 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 87 [2021-03-10 23:57:32,113 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_125], 6=[v_prenex_124, v_prenex_126]} [2021-03-10 23:57:32,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:32,151 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-10 23:57:32,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-10 23:57:32,153 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:32,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:32,188 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-10 23:57:32,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-10 23:57:32,193 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:32,474 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-03-10 23:57:32,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:57:32,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:32,499 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:57:32,500 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 16 treesize of output 26 [2021-03-10 23:57:32,506 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:32,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:32,531 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-10 23:57:32,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-10 23:57:32,534 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:32,807 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-03-10 23:57:32,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:57:32,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:32,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:32,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:32,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:32,838 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:57:32,838 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 [2021-03-10 23:57:32,844 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:32,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:32,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:32,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:32,870 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-10 23:57:32,870 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 [2021-03-10 23:57:32,872 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:33,093 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-03-10 23:57:33,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:57:33,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:33,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:33,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:33,131 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-10 23:57:33,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-03-10 23:57:33,133 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:33,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:57:33,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:33,162 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-10 23:57:33,162 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 [2021-03-10 23:57:33,165 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:33,377 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-03-10 23:57:33,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:57:33,404 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 23:57:33,405 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 13 variables, input treesize:433, output treesize:357 [2021-03-10 23:57:33,687 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2021-03-10 23:57:33,736 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:57:33,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:57:33,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 23:57:33,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580335569] [2021-03-10 23:57:33,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 23:57:33,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:57:33,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 23:57:33,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-03-10 23:57:33,737 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) [2021-03-10 23:57:34,271 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 37 [2021-03-10 23:57:34,746 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 44 [2021-03-10 23:57:35,074 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2021-03-10 23:57:35,395 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 39 [2021-03-10 23:57:35,733 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 43 [2021-03-10 23:57:35,967 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-03-10 23:57:36,117 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 40 [2021-03-10 23:57:36,354 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-03-10 23:57:36,997 WARN L205 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2021-03-10 23:57:37,158 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 46 [2021-03-10 23:57:37,330 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 43 [2021-03-10 23:57:38,146 WARN L205 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 70 [2021-03-10 23:57:38,672 WARN L205 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 62 [2021-03-10 23:57:38,870 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 50 [2021-03-10 23:57:39,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:57:39,381 INFO L93 Difference]: Finished difference Result 2283 states and 7340 transitions. [2021-03-10 23:57:39,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 23:57:39,382 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 [2021-03-10 23:57:39,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:57:39,385 INFO L225 Difference]: With dead ends: 2283 [2021-03-10 23:57:39,385 INFO L226 Difference]: Without dead ends: 2261 [2021-03-10 23:57:39,387 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 6414.4ms TimeCoverageRelationStatistics Valid=474, Invalid=2282, Unknown=0, NotChecked=0, Total=2756 [2021-03-10 23:57:39,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2261 states. [2021-03-10 23:57:39,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2261 to 1570. [2021-03-10 23:57:39,404 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) [2021-03-10 23:57:39,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1570 states to 1570 states and 5276 transitions. [2021-03-10 23:57:39,407 INFO L78 Accepts]: Start accepts. Automaton has 1570 states and 5276 transitions. Word has length 26 [2021-03-10 23:57:39,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:57:39,407 INFO L480 AbstractCegarLoop]: Abstraction has 1570 states and 5276 transitions. [2021-03-10 23:57:39,407 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) [2021-03-10 23:57:39,407 INFO L276 IsEmpty]: Start isEmpty. Operand 1570 states and 5276 transitions. [2021-03-10 23:57:39,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:57:39,409 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:57:39,409 INFO L519 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] [2021-03-10 23:57:39,613 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1304,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:57:39,613 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:57:39,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:57:39,613 INFO L82 PathProgramCache]: Analyzing trace with hash 920603198, now seen corresponding path program 45 times [2021-03-10 23:57:39,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:57:39,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385685433] [2021-03-10 23:57:39,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:57:39,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:57:40,119 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:57:40,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385685433] [2021-03-10 23:57:40,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529385313] [2021-03-10 23:57:40,119 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 [2021-03-10 23:57:40,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:57:40,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:57:40,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 23:57:40,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:57:40,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:40,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:40,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:40,897 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-03-10 23:57:40,898 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 [2021-03-10 23:57:40,900 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:40,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:40,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:40,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:40,942 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:57:40,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-03-10 23:57:40,949 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:40,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:40,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:40,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:40,987 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-03-10 23:57:40,988 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 [2021-03-10 23:57:40,989 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:40,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:40,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:41,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:41,015 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-10 23:57:41,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-03-10 23:57:41,016 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:41,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:41,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:41,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:41,053 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-03-10 23:57:41,053 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 [2021-03-10 23:57:41,055 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:41,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:41,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:41,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:41,091 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:57:41,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-03-10 23:57:41,100 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:41,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:41,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:41,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:41,140 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 23:57:41,140 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 [2021-03-10 23:57:41,145 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:41,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:41,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:41,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:41,182 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-03-10 23:57:41,182 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 [2021-03-10 23:57:41,184 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:41,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:41,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:41,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:41,221 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-03-10 23:57:41,221 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 [2021-03-10 23:57:41,223 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:41,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:41,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:41,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:41,261 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-03-10 23:57:41,261 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 [2021-03-10 23:57:41,266 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:41,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:41,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:41,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:41,301 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-03-10 23:57:41,301 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 43 treesize of output 28 [2021-03-10 23:57:41,303 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:41,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:41,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:41,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:41,328 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-10 23:57:41,328 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 [2021-03-10 23:57:41,329 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:41,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:41,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:41,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:41,354 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-10 23:57:41,354 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 [2021-03-10 23:57:41,355 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:41,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:41,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:41,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:41,376 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-10 23:57:41,376 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 30 treesize of output 1 [2021-03-10 23:57:41,377 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:41,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:41,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:41,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:41,401 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-10 23:57:41,401 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 43 treesize of output 1 [2021-03-10 23:57:41,402 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:41,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:41,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:41,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:41,427 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-03-10 23:57:41,427 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 [2021-03-10 23:57:41,429 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:41,696 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 30 [2021-03-10 23:57:41,696 INFO L628 ElimStorePlain]: treesize reduction 255, result has 38.4 percent of original size [2021-03-10 23:57:41,698 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 23:57:41,698 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:953, output treesize:180 [2021-03-10 23:57:41,849 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-03-10 23:57:41,895 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:57:41,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:57:41,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-03-10 23:57:41,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201380331] [2021-03-10 23:57:41,896 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 23:57:41,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:57:41,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 23:57:41,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-03-10 23:57:41,896 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) [2021-03-10 23:57:43,030 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2021-03-10 23:57:43,161 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-03-10 23:57:43,296 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-03-10 23:57:43,787 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2021-03-10 23:57:43,951 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2021-03-10 23:57:44,401 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-03-10 23:57:44,555 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2021-03-10 23:57:45,094 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-03-10 23:57:45,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:57:45,732 INFO L93 Difference]: Finished difference Result 2436 states and 7650 transitions. [2021-03-10 23:57:45,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-10 23:57:45,732 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 [2021-03-10 23:57:45,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:57:45,736 INFO L225 Difference]: With dead ends: 2436 [2021-03-10 23:57:45,736 INFO L226 Difference]: Without dead ends: 2406 [2021-03-10 23:57:45,736 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1066 ImplicationChecksByTransitivity, 3811.8ms TimeCoverageRelationStatistics Valid=513, Invalid=2909, Unknown=0, NotChecked=0, Total=3422 [2021-03-10 23:57:45,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2406 states. [2021-03-10 23:57:45,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2406 to 1617. [2021-03-10 23:57:45,755 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) [2021-03-10 23:57:45,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1617 states to 1617 states and 5429 transitions. [2021-03-10 23:57:45,758 INFO L78 Accepts]: Start accepts. Automaton has 1617 states and 5429 transitions. Word has length 26 [2021-03-10 23:57:45,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:57:45,758 INFO L480 AbstractCegarLoop]: Abstraction has 1617 states and 5429 transitions. [2021-03-10 23:57:45,758 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) [2021-03-10 23:57:45,758 INFO L276 IsEmpty]: Start isEmpty. Operand 1617 states and 5429 transitions. [2021-03-10 23:57:45,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:57:45,760 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:57:45,760 INFO L519 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] [2021-03-10 23:57:45,974 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1380,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:57:45,975 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:57:45,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:57:45,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1936410854, now seen corresponding path program 24 times [2021-03-10 23:57:45,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:57:45,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992307309] [2021-03-10 23:57:45,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:57:45,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:57:46,442 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:57:46,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992307309] [2021-03-10 23:57:46,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424443363] [2021-03-10 23:57:46,443 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 [2021-03-10 23:57:46,462 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:57:46,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:57:46,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-10 23:57:46,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:57:46,955 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-03-10 23:57:47,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:47,323 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:57:47,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:57:47,326 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:47,519 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2021-03-10 23:57:47,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:57:47,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:47,551 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-03-10 23:57:47,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-10 23:57:47,556 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:47,746 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-03-10 23:57:47,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:57:47,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:47,778 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-03-10 23:57:47,778 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 34 [2021-03-10 23:57:47,783 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:47,962 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2021-03-10 23:57:47,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:57:47,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:47,989 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-03-10 23:57:47,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-10 23:57:47,991 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:48,164 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-03-10 23:57:48,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:57:48,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:48,199 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-03-10 23:57:48,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-10 23:57:48,201 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:48,371 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-03-10 23:57:48,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:57:48,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:48,392 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:57:48,392 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 34 [2021-03-10 23:57:48,400 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:48,564 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-03-10 23:57:48,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:57:48,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:48,586 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:57:48,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:57:48,588 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:48,753 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-03-10 23:57:48,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:57:48,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:48,781 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-03-10 23:57:48,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-10 23:57:48,783 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:48,949 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-03-10 23:57:48,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:57:48,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 23:57:48,963 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:445, output treesize:504 [2021-03-10 23:57:49,358 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2021-03-10 23:57:49,530 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-03-10 23:57:49,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:57:49,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:57:49,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 23:57:49,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903166325] [2021-03-10 23:57:49,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 23:57:49,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:57:49,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 23:57:49,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-03-10 23:57:49,675 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) [2021-03-10 23:57:50,276 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 45 [2021-03-10 23:57:50,681 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 54 [2021-03-10 23:57:51,014 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 52 [2021-03-10 23:57:51,165 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 46 [2021-03-10 23:57:51,401 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2021-03-10 23:57:51,867 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 55 [2021-03-10 23:57:52,014 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-03-10 23:57:52,201 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2021-03-10 23:57:52,571 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2021-03-10 23:57:53,240 WARN L205 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 81 [2021-03-10 23:57:53,832 WARN L205 SmtUtils]: Spent 526.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 84 [2021-03-10 23:57:54,476 WARN L205 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 80 [2021-03-10 23:57:54,812 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-03-10 23:57:55,208 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 60 [2021-03-10 23:57:55,764 WARN L205 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 68 [2021-03-10 23:57:56,485 WARN L205 SmtUtils]: Spent 682.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 60 [2021-03-10 23:57:56,815 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 42 [2021-03-10 23:57:57,715 WARN L205 SmtUtils]: Spent 788.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 70 [2021-03-10 23:57:58,114 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 45 [2021-03-10 23:57:58,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:57:58,184 INFO L93 Difference]: Finished difference Result 2483 states and 7942 transitions. [2021-03-10 23:57:58,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 23:57:58,185 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 [2021-03-10 23:57:58,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:57:58,188 INFO L225 Difference]: With dead ends: 2483 [2021-03-10 23:57:58,188 INFO L226 Difference]: Without dead ends: 2449 [2021-03-10 23:57:58,189 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 9078.0ms TimeCoverageRelationStatistics Valid=396, Invalid=1956, Unknown=0, NotChecked=0, Total=2352 [2021-03-10 23:57:58,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2449 states. [2021-03-10 23:57:58,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2449 to 1632. [2021-03-10 23:57:58,208 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) [2021-03-10 23:57:58,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1632 states to 1632 states and 5493 transitions. [2021-03-10 23:57:58,211 INFO L78 Accepts]: Start accepts. Automaton has 1632 states and 5493 transitions. Word has length 26 [2021-03-10 23:57:58,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:57:58,211 INFO L480 AbstractCegarLoop]: Abstraction has 1632 states and 5493 transitions. [2021-03-10 23:57:58,211 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) [2021-03-10 23:57:58,211 INFO L276 IsEmpty]: Start isEmpty. Operand 1632 states and 5493 transitions. [2021-03-10 23:57:58,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:57:58,213 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:57:58,213 INFO L519 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] [2021-03-10 23:57:58,413 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1506,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:57:58,413 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:57:58,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:57:58,414 INFO L82 PathProgramCache]: Analyzing trace with hash 885830154, now seen corresponding path program 25 times [2021-03-10 23:57:58,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:57:58,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606254528] [2021-03-10 23:57:58,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:57:58,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:57:58,855 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:57:58,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606254528] [2021-03-10 23:57:58,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870537378] [2021-03-10 23:57:58,855 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 [2021-03-10 23:57:58,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:57:58,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 23:57:58,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:57:59,332 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-10 23:57:59,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:59,414 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:57:59,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:57:59,420 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:59,575 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-03-10 23:57:59,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:57:59,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:59,591 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:57:59,591 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 26 treesize of output 24 [2021-03-10 23:57:59,593 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:59,741 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-03-10 23:57:59,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:57:59,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:59,757 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:57:59,758 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 [2021-03-10 23:57:59,761 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:57:59,914 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-03-10 23:57:59,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:57:59,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:57:59,932 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:57:59,932 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 [2021-03-10 23:57:59,934 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:00,078 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-03-10 23:58:00,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:58:00,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:00,094 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-10 23:58:00,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:58:00,096 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:00,245 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-03-10 23:58:00,246 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:58:00,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:00,259 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:58:00,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:58:00,264 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:00,396 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-03-10 23:58:00,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:58:00,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:00,411 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-10 23:58:00,411 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 28 treesize of output 20 [2021-03-10 23:58:00,413 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:00,541 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-03-10 23:58:00,541 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:58:00,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:00,555 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-10 23:58:00,555 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 21 treesize of output 17 [2021-03-10 23:58:00,557 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:00,688 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-03-10 23:58:00,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:58:00,695 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 23:58:00,695 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:325, output treesize:174 [2021-03-10 23:58:00,949 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:58:00,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:58:00,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 23:58:00,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558005350] [2021-03-10 23:58:00,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 23:58:00,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:58:00,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 23:58:00,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-03-10 23:58:00,950 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) [2021-03-10 23:58:01,373 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-03-10 23:58:01,738 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2021-03-10 23:58:02,469 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-03-10 23:58:03,037 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2021-03-10 23:58:03,446 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-03-10 23:58:03,677 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2021-03-10 23:58:04,186 WARN L205 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2021-03-10 23:58:04,443 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 68 [2021-03-10 23:58:04,779 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-03-10 23:58:05,163 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 42 [2021-03-10 23:58:05,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:58:05,384 INFO L93 Difference]: Finished difference Result 2652 states and 8518 transitions. [2021-03-10 23:58:05,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 23:58:05,385 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 [2021-03-10 23:58:05,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:58:05,388 INFO L225 Difference]: With dead ends: 2652 [2021-03-10 23:58:05,388 INFO L226 Difference]: Without dead ends: 2618 [2021-03-10 23:58:05,389 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 4232.4ms TimeCoverageRelationStatistics Valid=363, Invalid=1277, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 23:58:05,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2618 states. [2021-03-10 23:58:05,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2618 to 1646. [2021-03-10 23:58:05,416 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) [2021-03-10 23:58:05,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1646 states to 1646 states and 5551 transitions. [2021-03-10 23:58:05,419 INFO L78 Accepts]: Start accepts. Automaton has 1646 states and 5551 transitions. Word has length 26 [2021-03-10 23:58:05,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:58:05,419 INFO L480 AbstractCegarLoop]: Abstraction has 1646 states and 5551 transitions. [2021-03-10 23:58:05,419 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) [2021-03-10 23:58:05,419 INFO L276 IsEmpty]: Start isEmpty. Operand 1646 states and 5551 transitions. [2021-03-10 23:58:05,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:58:05,421 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:58:05,421 INFO L519 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] [2021-03-10 23:58:05,621 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1537 [2021-03-10 23:58:05,621 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:58:05,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:58:05,622 INFO L82 PathProgramCache]: Analyzing trace with hash 2122915566, now seen corresponding path program 46 times [2021-03-10 23:58:05,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:58:05,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740335017] [2021-03-10 23:58:05,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:58:05,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:58:06,175 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:58:06,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740335017] [2021-03-10 23:58:06,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596837741] [2021-03-10 23:58:06,176 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 [2021-03-10 23:58:06,194 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:58:06,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:58:06,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-10 23:58:06,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:58:06,526 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-03-10 23:58:06,778 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-03-10 23:58:07,043 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 58 [2021-03-10 23:58:07,170 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_182, v_prenex_178], 6=[A, v_prenex_180]} [2021-03-10 23:58:07,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:07,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:07,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:07,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-10 23:58:07,182 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:07,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:07,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:07,189 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 23 treesize of output 13 [2021-03-10 23:58:07,190 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:07,340 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 52 [2021-03-10 23:58:07,341 INFO L628 ElimStorePlain]: treesize reduction 152, result has 43.3 percent of original size [2021-03-10 23:58:07,341 INFO L518 ElimStorePlain]: Eliminatee v_prenex_178 vanished before elimination [2021-03-10 23:58:07,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:07,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:07,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-10 23:58:07,348 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:07,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:58:07,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:07,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:07,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:07,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-10 23:58:07,404 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:07,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:58:07,449 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 23:58:07,449 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:329, output treesize:31 [2021-03-10 23:58:07,483 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:58:07,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:58:07,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-03-10 23:58:07,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676921088] [2021-03-10 23:58:07,484 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 23:58:07,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:58:07,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 23:58:07,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-03-10 23:58:07,484 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) [2021-03-10 23:58:08,213 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 30 [2021-03-10 23:58:08,346 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 36 [2021-03-10 23:58:09,008 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 33 [2021-03-10 23:58:09,138 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-03-10 23:58:09,278 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-03-10 23:58:09,509 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-03-10 23:58:09,740 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2021-03-10 23:58:09,877 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-03-10 23:58:10,299 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2021-03-10 23:58:10,540 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-03-10 23:58:10,735 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-03-10 23:58:11,155 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 76 [2021-03-10 23:58:11,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:58:11,949 INFO L93 Difference]: Finished difference Result 2533 states and 8068 transitions. [2021-03-10 23:58:11,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-10 23:58:11,950 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 [2021-03-10 23:58:11,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:58:11,954 INFO L225 Difference]: With dead ends: 2533 [2021-03-10 23:58:11,954 INFO L226 Difference]: Without dead ends: 2503 [2021-03-10 23:58:11,954 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 825 ImplicationChecksByTransitivity, 4875.2ms TimeCoverageRelationStatistics Valid=499, Invalid=2153, Unknown=0, NotChecked=0, Total=2652 [2021-03-10 23:58:11,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2503 states. [2021-03-10 23:58:11,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2503 to 1730. [2021-03-10 23:58:11,985 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) [2021-03-10 23:58:11,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1730 states to 1730 states and 5852 transitions. [2021-03-10 23:58:11,988 INFO L78 Accepts]: Start accepts. Automaton has 1730 states and 5852 transitions. Word has length 26 [2021-03-10 23:58:11,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:58:11,988 INFO L480 AbstractCegarLoop]: Abstraction has 1730 states and 5852 transitions. [2021-03-10 23:58:11,988 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) [2021-03-10 23:58:11,988 INFO L276 IsEmpty]: Start isEmpty. Operand 1730 states and 5852 transitions. [2021-03-10 23:58:11,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:58:11,990 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:58:11,990 INFO L519 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] [2021-03-10 23:58:12,195 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1552 [2021-03-10 23:58:12,195 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:58:12,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:58:12,195 INFO L82 PathProgramCache]: Analyzing trace with hash -338403078, now seen corresponding path program 47 times [2021-03-10 23:58:12,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:58:12,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502044822] [2021-03-10 23:58:12,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:58:12,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:58:12,866 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:58:12,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502044822] [2021-03-10 23:58:12,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886905002] [2021-03-10 23:58:12,866 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 23:58:12,887 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 23:58:12,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:58:12,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-10 23:58:12,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:58:13,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:13,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:13,544 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:58:13,545 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 [2021-03-10 23:58:13,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:13,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:13,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:13,591 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:58:13,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-03-10 23:58:13,598 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:13,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:13,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:13,633 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-03-10 23:58:13,633 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 28 treesize of output 26 [2021-03-10 23:58:13,636 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:13,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:13,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:13,673 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-03-10 23:58:13,673 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 34 treesize of output 28 [2021-03-10 23:58:13,676 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:13,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:13,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:13,701 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-10 23:58:13,702 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 1 [2021-03-10 23:58:13,703 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:13,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:13,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:13,739 INFO L354 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2021-03-10 23:58:13,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-03-10 23:58:13,741 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:13,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:13,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:13,778 INFO L354 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2021-03-10 23:58:13,779 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 [2021-03-10 23:58:13,780 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:13,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:13,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:13,804 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-10 23:58:13,804 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 [2021-03-10 23:58:13,805 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:13,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:13,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:13,830 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-10 23:58:13,830 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 33 treesize of output 1 [2021-03-10 23:58:13,831 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:13,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:13,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:13,854 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-10 23:58:13,855 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 [2021-03-10 23:58:13,856 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:13,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:13,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:13,879 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-10 23:58:13,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-03-10 23:58:13,880 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:13,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:13,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:13,915 INFO L354 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2021-03-10 23:58:13,915 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 [2021-03-10 23:58:13,917 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:13,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:13,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:13,944 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-10 23:58:13,944 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 [2021-03-10 23:58:13,945 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:13,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:13,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:13,969 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-10 23:58:13,969 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 [2021-03-10 23:58:13,970 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:13,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:13,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:13,994 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-10 23:58:13,994 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 [2021-03-10 23:58:13,995 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:13,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:14,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:14,019 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-03-10 23:58:14,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-03-10 23:58:14,021 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:14,160 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 26 [2021-03-10 23:58:14,160 INFO L628 ElimStorePlain]: treesize reduction 108, result has 46.3 percent of original size [2021-03-10 23:58:14,163 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 23:58:14,163 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:761, output treesize:83 [2021-03-10 23:58:14,319 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:58:14,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:58:14,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-03-10 23:58:14,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066145] [2021-03-10 23:58:14,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 23:58:14,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:58:14,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 23:58:14,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-03-10 23:58:14,320 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) [2021-03-10 23:58:15,192 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2021-03-10 23:58:15,714 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 40 [2021-03-10 23:58:15,925 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-03-10 23:58:16,203 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-03-10 23:58:16,576 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2021-03-10 23:58:16,840 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-03-10 23:58:16,962 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 35 [2021-03-10 23:58:17,424 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-03-10 23:58:17,581 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2021-03-10 23:58:17,909 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 39 [2021-03-10 23:58:18,054 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 25 [2021-03-10 23:58:18,394 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 42 [2021-03-10 23:58:18,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:58:18,731 INFO L93 Difference]: Finished difference Result 2949 states and 9251 transitions. [2021-03-10 23:58:18,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-10 23:58:18,732 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 [2021-03-10 23:58:18,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:58:18,736 INFO L225 Difference]: With dead ends: 2949 [2021-03-10 23:58:18,736 INFO L226 Difference]: Without dead ends: 2901 [2021-03-10 23:58:18,737 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1017 ImplicationChecksByTransitivity, 4458.5ms TimeCoverageRelationStatistics Valid=626, Invalid=2566, Unknown=0, NotChecked=0, Total=3192 [2021-03-10 23:58:18,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2901 states. [2021-03-10 23:58:18,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2901 to 1752. [2021-03-10 23:58:18,759 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) [2021-03-10 23:58:18,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 5931 transitions. [2021-03-10 23:58:18,762 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 5931 transitions. Word has length 26 [2021-03-10 23:58:18,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:58:18,762 INFO L480 AbstractCegarLoop]: Abstraction has 1752 states and 5931 transitions. [2021-03-10 23:58:18,762 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) [2021-03-10 23:58:18,762 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 5931 transitions. [2021-03-10 23:58:18,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:58:18,764 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:58:18,764 INFO L519 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] [2021-03-10 23:58:18,975 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1571,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:58:18,975 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:58:18,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:58:18,975 INFO L82 PathProgramCache]: Analyzing trace with hash 2079051698, now seen corresponding path program 26 times [2021-03-10 23:58:18,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:58:18,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045753968] [2021-03-10 23:58:18,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:58:18,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:58:19,167 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-03-10 23:58:19,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:58:19,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045753968] [2021-03-10 23:58:19,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94729721] [2021-03-10 23:58:19,414 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 [2021-03-10 23:58:19,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:58:19,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:58:19,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-10 23:58:19,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:58:19,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:19,795 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 23:58:19,795 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 [2021-03-10 23:58:19,797 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:19,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:19,809 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 23:58:19,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:58:19,811 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:19,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:19,828 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-10 23:58:19,829 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 [2021-03-10 23:58:19,831 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:19,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:19,843 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 23:58:19,843 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 33 treesize of output 19 [2021-03-10 23:58:19,844 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:19,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:19,860 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:58:19,860 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 [2021-03-10 23:58:19,862 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:19,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:19,882 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-10 23:58:19,882 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 [2021-03-10 23:58:19,885 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:19,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:19,898 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 23:58:19,898 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 19 [2021-03-10 23:58:19,899 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:19,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:19,915 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:58:19,916 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 26 treesize of output 24 [2021-03-10 23:58:19,918 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:19,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:19,931 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 23:58:19,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:58:19,932 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:19,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:19,948 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:58:19,948 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 [2021-03-10 23:58:19,954 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:19,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:19,969 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 23:58:19,969 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 [2021-03-10 23:58:19,970 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:19,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:19,987 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:58:19,988 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 [2021-03-10 23:58:19,991 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:19,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:20,010 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-10 23:58:20,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:58:20,012 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:20,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:20,028 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:58:20,028 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 [2021-03-10 23:58:20,034 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:20,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:20,047 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 23:58:20,048 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 [2021-03-10 23:58:20,049 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:20,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:20,057 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 23:58:20,057 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 [2021-03-10 23:58:20,059 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:20,172 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-10 23:58:20,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:58:20,174 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 23:58:20,174 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-03-10 23:58:20,321 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-10 23:58:20,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:58:20,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:58:20,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-03-10 23:58:20,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732367839] [2021-03-10 23:58:20,470 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 23:58:20,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:58:20,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 23:58:20,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-03-10 23:58:20,471 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) [2021-03-10 23:58:20,713 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 21 [2021-03-10 23:58:21,108 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2021-03-10 23:58:21,311 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 41 [2021-03-10 23:58:21,658 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2021-03-10 23:58:21,953 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-03-10 23:58:22,225 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 45 [2021-03-10 23:58:22,588 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2021-03-10 23:58:22,958 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-03-10 23:58:23,153 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2021-03-10 23:58:23,284 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-10 23:58:23,569 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-03-10 23:58:23,901 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2021-03-10 23:58:24,359 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 44 [2021-03-10 23:58:24,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:58:24,441 INFO L93 Difference]: Finished difference Result 2355 states and 7783 transitions. [2021-03-10 23:58:24,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 23:58:24,441 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 [2021-03-10 23:58:24,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:58:24,445 INFO L225 Difference]: With dead ends: 2355 [2021-03-10 23:58:24,445 INFO L226 Difference]: Without dead ends: 2336 [2021-03-10 23:58:24,445 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 4073.0ms TimeCoverageRelationStatistics Valid=262, Invalid=1378, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 23:58:24,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2336 states. [2021-03-10 23:58:24,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2336 to 1738. [2021-03-10 23:58:24,464 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) [2021-03-10 23:58:24,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1738 states to 1738 states and 5871 transitions. [2021-03-10 23:58:24,467 INFO L78 Accepts]: Start accepts. Automaton has 1738 states and 5871 transitions. Word has length 26 [2021-03-10 23:58:24,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:58:24,467 INFO L480 AbstractCegarLoop]: Abstraction has 1738 states and 5871 transitions. [2021-03-10 23:58:24,467 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) [2021-03-10 23:58:24,468 INFO L276 IsEmpty]: Start isEmpty. Operand 1738 states and 5871 transitions. [2021-03-10 23:58:24,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:58:24,470 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:58:24,470 INFO L519 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] [2021-03-10 23:58:24,670 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1671 [2021-03-10 23:58:24,670 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:58:24,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:58:24,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1795376066, now seen corresponding path program 27 times [2021-03-10 23:58:24,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:58:24,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177454251] [2021-03-10 23:58:24,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:58:24,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:58:24,866 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2021-03-10 23:58:25,053 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-03-10 23:58:25,228 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-03-10 23:58:25,359 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:58:25,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177454251] [2021-03-10 23:58:25,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825033667] [2021-03-10 23:58:25,360 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 [2021-03-10 23:58:25,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:58:25,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:58:25,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 23:58:25,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:58:25,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:25,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:25,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:25,728 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-03-10 23:58:25,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-03-10 23:58:25,733 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:25,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:25,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:25,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:25,752 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-03-10 23:58:25,752 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 [2021-03-10 23:58:25,753 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:25,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:25,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:25,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:25,772 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-03-10 23:58:25,772 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 [2021-03-10 23:58:25,773 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:25,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:25,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:25,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:25,792 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-03-10 23:58:25,793 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 [2021-03-10 23:58:25,794 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:25,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:25,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:25,826 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-03-10 23:58:25,826 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 [2021-03-10 23:58:25,828 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:25,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:25,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:25,847 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-03-10 23:58:25,848 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 [2021-03-10 23:58:25,849 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:25,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:25,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:25,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:25,886 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-03-10 23:58:25,886 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 [2021-03-10 23:58:25,888 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:25,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:25,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:25,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:25,907 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-03-10 23:58:25,907 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 16 [2021-03-10 23:58:25,908 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:25,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:25,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:25,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:25,937 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:58:25,937 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 [2021-03-10 23:58:25,945 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:25,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:25,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:25,975 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:58:25,975 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 [2021-03-10 23:58:25,977 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:25,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:25,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:26,008 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:58:26,008 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 [2021-03-10 23:58:26,011 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:26,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:26,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:26,031 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-03-10 23:58:26,031 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 [2021-03-10 23:58:26,032 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:26,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:26,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:26,050 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-03-10 23:58:26,050 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 [2021-03-10 23:58:26,051 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:26,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:26,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:26,070 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-03-10 23:58:26,070 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 [2021-03-10 23:58:26,071 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:26,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:26,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:26,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:26,104 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-03-10 23:58:26,104 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 [2021-03-10 23:58:26,106 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:26,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:26,133 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-03-10 23:58:26,134 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 [2021-03-10 23:58:26,139 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:26,340 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-10 23:58:26,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:58:26,343 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 23:58:26,343 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:905, output treesize:313 [2021-03-10 23:58:26,572 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-10 23:58:26,805 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-10 23:58:27,190 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-03-10 23:58:27,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:58:27,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:58:27,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-03-10 23:58:27,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617233989] [2021-03-10 23:58:27,346 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 23:58:27,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:58:27,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 23:58:27,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-03-10 23:58:27,346 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) [2021-03-10 23:58:28,696 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-03-10 23:58:29,074 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2021-03-10 23:58:29,343 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2021-03-10 23:58:29,705 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 61 [2021-03-10 23:58:30,225 WARN L205 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-03-10 23:58:30,863 WARN L205 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2021-03-10 23:58:31,435 WARN L205 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 39 [2021-03-10 23:58:31,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:58:31,678 INFO L93 Difference]: Finished difference Result 2428 states and 7983 transitions. [2021-03-10 23:58:31,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 23:58:31,679 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 [2021-03-10 23:58:31,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:58:31,682 INFO L225 Difference]: With dead ends: 2428 [2021-03-10 23:58:31,682 INFO L226 Difference]: Without dead ends: 2378 [2021-03-10 23:58:31,682 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 4839.2ms TimeCoverageRelationStatistics Valid=258, Invalid=1224, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 23:58:31,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2378 states. [2021-03-10 23:58:31,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2378 to 1738. [2021-03-10 23:58:31,701 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) [2021-03-10 23:58:31,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1738 states to 1738 states and 5871 transitions. [2021-03-10 23:58:31,704 INFO L78 Accepts]: Start accepts. Automaton has 1738 states and 5871 transitions. Word has length 26 [2021-03-10 23:58:31,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:58:31,704 INFO L480 AbstractCegarLoop]: Abstraction has 1738 states and 5871 transitions. [2021-03-10 23:58:31,704 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) [2021-03-10 23:58:31,704 INFO L276 IsEmpty]: Start isEmpty. Operand 1738 states and 5871 transitions. [2021-03-10 23:58:31,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:58:31,707 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:58:31,707 INFO L519 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] [2021-03-10 23:58:31,907 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1688 [2021-03-10 23:58:31,907 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:58:31,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:58:31,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1946487342, now seen corresponding path program 48 times [2021-03-10 23:58:31,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:58:31,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724651867] [2021-03-10 23:58:31,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:58:31,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:58:32,126 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-03-10 23:58:32,257 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-03-10 23:58:32,379 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 33 [2021-03-10 23:58:32,583 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:58:32,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724651867] [2021-03-10 23:58:32,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377972391] [2021-03-10 23:58:32,584 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 [2021-03-10 23:58:32,603 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 23:58:32,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:58:32,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-10 23:58:32,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:58:33,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:33,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:33,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:33,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:33,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:33,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:33,397 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 [2021-03-10 23:58:33,398 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:33,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:33,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:33,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:33,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:33,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:33,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:33,411 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 [2021-03-10 23:58:33,413 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:33,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:33,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:33,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:33,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:33,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:33,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:33,425 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 34 treesize of output 16 [2021-03-10 23:58:33,426 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:33,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:33,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:33,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:33,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:33,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:33,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:33,440 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 30 treesize of output 13 [2021-03-10 23:58:33,441 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:33,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:33,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:33,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:33,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:33,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:33,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:33,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-03-10 23:58:33,456 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:33,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:33,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:33,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:33,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:33,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:33,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:33,469 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 [2021-03-10 23:58:33,471 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:33,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:33,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:33,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:33,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:33,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:33,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:33,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-03-10 23:58:33,487 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:33,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:33,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:33,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:33,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:33,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:33,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:33,499 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 [2021-03-10 23:58:33,501 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:33,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:33,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:33,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:33,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:33,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:33,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:33,513 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 32 treesize of output 16 [2021-03-10 23:58:33,514 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:33,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:33,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:33,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:33,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:33,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:33,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:33,534 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 [2021-03-10 23:58:33,535 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:33,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:33,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:33,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:33,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:33,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:33,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:33,547 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 [2021-03-10 23:58:33,548 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:33,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:33,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:33,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:33,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:33,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:33,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:33,560 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 43 treesize of output 19 [2021-03-10 23:58:33,561 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:33,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:33,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:33,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:33,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:33,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:33,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:33,573 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 [2021-03-10 23:58:33,574 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:33,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:33,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:33,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:33,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:33,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:33,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:33,585 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 [2021-03-10 23:58:33,587 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:33,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:33,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:33,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:33,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:33,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:33,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:33,598 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 [2021-03-10 23:58:33,600 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:33,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:33,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:33,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:33,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:33,606 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 43 treesize of output 13 [2021-03-10 23:58:33,608 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:33,657 INFO L628 ElimStorePlain]: treesize reduction 20, result has 64.9 percent of original size [2021-03-10 23:58:33,659 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:58:33,659 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:27 [2021-03-10 23:58:33,716 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:58:33,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:58:33,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-03-10 23:58:33,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779341466] [2021-03-10 23:58:33,717 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 23:58:33,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:58:33,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 23:58:33,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-03-10 23:58:33,717 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) [2021-03-10 23:58:34,401 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2021-03-10 23:58:34,790 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 41 [2021-03-10 23:58:34,964 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 43 [2021-03-10 23:58:35,357 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 43 [2021-03-10 23:58:35,493 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 34 [2021-03-10 23:58:36,017 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 45 [2021-03-10 23:58:36,149 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 41 [2021-03-10 23:58:36,695 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-03-10 23:58:36,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:58:36,823 INFO L93 Difference]: Finished difference Result 2197 states and 7216 transitions. [2021-03-10 23:58:36,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 23:58:36,824 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 [2021-03-10 23:58:36,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:58:36,827 INFO L225 Difference]: With dead ends: 2197 [2021-03-10 23:58:36,827 INFO L226 Difference]: Without dead ends: 2175 [2021-03-10 23:58:36,828 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 3333.9ms TimeCoverageRelationStatistics Valid=375, Invalid=1605, Unknown=0, NotChecked=0, Total=1980 [2021-03-10 23:58:36,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2175 states. [2021-03-10 23:58:36,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2175 to 1734. [2021-03-10 23:58:36,846 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) [2021-03-10 23:58:36,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 5855 transitions. [2021-03-10 23:58:36,849 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 5855 transitions. Word has length 26 [2021-03-10 23:58:36,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:58:36,849 INFO L480 AbstractCegarLoop]: Abstraction has 1734 states and 5855 transitions. [2021-03-10 23:58:36,849 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) [2021-03-10 23:58:36,849 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 5855 transitions. [2021-03-10 23:58:36,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:58:36,851 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:58:36,852 INFO L519 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] [2021-03-10 23:58:37,052 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1729,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:58:37,052 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:58:37,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:58:37,052 INFO L82 PathProgramCache]: Analyzing trace with hash 2027886398, now seen corresponding path program 49 times [2021-03-10 23:58:37,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:58:37,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404466997] [2021-03-10 23:58:37,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:58:37,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:58:37,731 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:58:37,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404466997] [2021-03-10 23:58:37,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344762339] [2021-03-10 23:58:37,731 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 [2021-03-10 23:58:37,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:58:37,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-10 23:58:37,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:58:38,278 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-03-10 23:58:38,353 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_186, v_prenex_188], 6=[A, v_prenex_184]} [2021-03-10 23:58:38,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:38,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:38,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:38,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-10 23:58:38,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:38,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:38,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:38,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-10 23:58:38,373 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:38,591 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2021-03-10 23:58:38,592 INFO L628 ElimStorePlain]: treesize reduction 168, result has 46.7 percent of original size [2021-03-10 23:58:38,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:38,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:38,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-10 23:58:38,603 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:38,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:58:38,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:38,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:38,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:38,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:38,695 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 [2021-03-10 23:58:38,696 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:38,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:58:38,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:38,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:58:38,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-10 23:58:38,757 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:38,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:58:38,805 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 23:58:38,805 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:381, output treesize:42 [2021-03-10 23:58:38,883 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:58:38,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:58:38,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-03-10 23:58:38,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892407] [2021-03-10 23:58:38,883 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 23:58:38,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:58:38,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 23:58:38,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-03-10 23:58:38,884 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) [2021-03-10 23:58:39,812 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 39 [2021-03-10 23:58:39,962 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 40 [2021-03-10 23:58:40,488 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 41 [2021-03-10 23:58:40,668 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 43 [2021-03-10 23:58:40,912 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 40 [2021-03-10 23:58:41,475 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 55 [2021-03-10 23:58:41,765 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 53 [2021-03-10 23:58:42,001 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 48 [2021-03-10 23:58:42,507 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-03-10 23:58:42,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:58:42,792 INFO L93 Difference]: Finished difference Result 2395 states and 7862 transitions. [2021-03-10 23:58:42,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 23:58:42,793 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 [2021-03-10 23:58:42,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:58:42,797 INFO L225 Difference]: With dead ends: 2395 [2021-03-10 23:58:42,797 INFO L226 Difference]: Without dead ends: 2380 [2021-03-10 23:58:42,797 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 4126.6ms TimeCoverageRelationStatistics Valid=407, Invalid=1755, Unknown=0, NotChecked=0, Total=2162 [2021-03-10 23:58:42,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2380 states. [2021-03-10 23:58:42,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2380 to 1734. [2021-03-10 23:58:42,817 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) [2021-03-10 23:58:42,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 5855 transitions. [2021-03-10 23:58:42,820 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 5855 transitions. Word has length 26 [2021-03-10 23:58:42,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:58:42,820 INFO L480 AbstractCegarLoop]: Abstraction has 1734 states and 5855 transitions. [2021-03-10 23:58:42,820 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) [2021-03-10 23:58:42,820 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 5855 transitions. [2021-03-10 23:58:42,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:58:42,822 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:58:42,822 INFO L519 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] [2021-03-10 23:58:43,022 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1843,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:58:43,022 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:58:43,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:58:43,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1611336786, now seen corresponding path program 50 times [2021-03-10 23:58:43,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:58:43,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461376395] [2021-03-10 23:58:43,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:58:43,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:58:43,611 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:58:43,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461376395] [2021-03-10 23:58:43,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171506064] [2021-03-10 23:58:43,612 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 [2021-03-10 23:58:43,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:58:43,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:58:43,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-10 23:58:43,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:58:43,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:43,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:43,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:43,990 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-03-10 23:58:43,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-03-10 23:58:43,993 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:44,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:44,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:44,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:44,037 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-03-10 23:58:44,037 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 41 treesize of output 26 [2021-03-10 23:58:44,039 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:44,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:44,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:44,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:44,082 INFO L354 Elim1Store]: treesize reduction 24, result has 22.6 percent of original size [2021-03-10 23:58:44,082 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 [2021-03-10 23:58:44,084 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:44,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:44,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:44,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:44,124 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-03-10 23:58:44,125 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 [2021-03-10 23:58:44,128 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:44,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:44,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:44,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:44,156 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-03-10 23:58:44,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-03-10 23:58:44,157 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:44,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:44,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:44,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:44,204 INFO L354 Elim1Store]: treesize reduction 12, result has 61.3 percent of original size [2021-03-10 23:58:44,204 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 [2021-03-10 23:58:44,210 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:44,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:44,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:44,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:44,264 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-03-10 23:58:44,264 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 [2021-03-10 23:58:44,266 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:44,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:44,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:44,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:44,295 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-03-10 23:58:44,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-03-10 23:58:44,297 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:44,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:44,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:44,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:44,327 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-03-10 23:58:44,327 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 [2021-03-10 23:58:44,328 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:44,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:44,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:44,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:44,370 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-03-10 23:58:44,370 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 [2021-03-10 23:58:44,372 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:44,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:44,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:44,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:44,412 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:58:44,412 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 [2021-03-10 23:58:44,422 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:44,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:44,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:44,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:44,449 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-03-10 23:58:44,449 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 [2021-03-10 23:58:44,450 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:44,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:44,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:44,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:44,477 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-03-10 23:58:44,477 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 [2021-03-10 23:58:44,479 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:44,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:44,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:44,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:44,504 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-03-10 23:58:44,504 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 [2021-03-10 23:58:44,506 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:44,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:44,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:44,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:44,531 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-03-10 23:58:44,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-03-10 23:58:44,532 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:44,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:44,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:44,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:44,547 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-03-10 23:58:44,547 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 [2021-03-10 23:58:44,548 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:44,690 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2021-03-10 23:58:44,691 INFO L628 ElimStorePlain]: treesize reduction 76, result has 55.0 percent of original size [2021-03-10 23:58:44,692 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 23:58:44,692 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:753, output treesize:93 [2021-03-10 23:58:44,857 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:58:44,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:58:44,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2021-03-10 23:58:44,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547454261] [2021-03-10 23:58:44,857 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 23:58:44,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:58:44,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 23:58:44,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-03-10 23:58:44,858 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) [2021-03-10 23:58:45,470 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2021-03-10 23:58:45,613 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 33 [2021-03-10 23:58:45,744 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-03-10 23:58:46,311 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 27 [2021-03-10 23:58:47,058 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2021-03-10 23:58:47,568 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-03-10 23:58:47,832 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 38 [2021-03-10 23:58:48,054 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-03-10 23:58:48,396 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2021-03-10 23:58:48,621 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2021-03-10 23:58:48,784 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-03-10 23:58:49,017 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2021-03-10 23:58:49,219 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2021-03-10 23:58:49,363 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 33 [2021-03-10 23:58:49,805 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-03-10 23:58:49,938 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 33 [2021-03-10 23:58:50,256 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-03-10 23:58:50,539 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-03-10 23:58:50,715 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 31 [2021-03-10 23:58:50,974 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-03-10 23:58:51,127 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 30 [2021-03-10 23:58:51,365 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 34 [2021-03-10 23:58:51,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:58:51,451 INFO L93 Difference]: Finished difference Result 3202 states and 10123 transitions. [2021-03-10 23:58:51,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-03-10 23:58:51,452 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 [2021-03-10 23:58:51,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:58:51,457 INFO L225 Difference]: With dead ends: 3202 [2021-03-10 23:58:51,457 INFO L226 Difference]: Without dead ends: 3138 [2021-03-10 23:58:51,457 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1142 ImplicationChecksByTransitivity, 6026.0ms TimeCoverageRelationStatistics Valid=727, Invalid=3055, Unknown=0, NotChecked=0, Total=3782 [2021-03-10 23:58:51,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3138 states. [2021-03-10 23:58:51,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3138 to 1784. [2021-03-10 23:58:51,481 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) [2021-03-10 23:58:51,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1784 states to 1784 states and 6023 transitions. [2021-03-10 23:58:51,484 INFO L78 Accepts]: Start accepts. Automaton has 1784 states and 6023 transitions. Word has length 26 [2021-03-10 23:58:51,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:58:51,484 INFO L480 AbstractCegarLoop]: Abstraction has 1784 states and 6023 transitions. [2021-03-10 23:58:51,484 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) [2021-03-10 23:58:51,484 INFO L276 IsEmpty]: Start isEmpty. Operand 1784 states and 6023 transitions. [2021-03-10 23:58:51,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:58:51,486 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:58:51,486 INFO L519 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] [2021-03-10 23:58:51,687 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1857 [2021-03-10 23:58:51,687 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:58:51,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:58:51,687 INFO L82 PathProgramCache]: Analyzing trace with hash -696255298, now seen corresponding path program 51 times [2021-03-10 23:58:51,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:58:51,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018650977] [2021-03-10 23:58:51,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:58:51,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:58:52,324 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:58:52,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018650977] [2021-03-10 23:58:52,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405515782] [2021-03-10 23:58:52,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 23:58:52,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 23:58:52,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:58:52,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 23:58:52,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:58:53,130 WARN L205 SmtUtils]: Spent 466.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-03-10 23:58:53,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:53,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:53,496 INFO L354 Elim1Store]: treesize reduction 22, result has 46.3 percent of original size [2021-03-10 23:58:53,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-03-10 23:58:53,499 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:53,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:53,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:53,559 INFO L354 Elim1Store]: treesize reduction 18, result has 56.1 percent of original size [2021-03-10 23:58:53,559 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 [2021-03-10 23:58:53,563 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:54,338 WARN L205 SmtUtils]: Spent 774.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2021-03-10 23:58:54,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:58:54,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:54,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:54,415 INFO L354 Elim1Store]: treesize reduction 18, result has 56.1 percent of original size [2021-03-10 23:58:54,416 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 [2021-03-10 23:58:54,422 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:54,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:54,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:54,497 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-03-10 23:58:54,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-03-10 23:58:54,504 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:55,194 WARN L205 SmtUtils]: Spent 689.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2021-03-10 23:58:55,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:58:55,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:55,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:55,270 INFO L354 Elim1Store]: treesize reduction 14, result has 65.9 percent of original size [2021-03-10 23:58:55,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-03-10 23:58:55,277 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:55,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:55,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:55,348 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:58:55,348 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 [2021-03-10 23:58:55,371 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:57,464 WARN L205 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 169 DAG size of output: 158 [2021-03-10 23:58:57,465 INFO L628 ElimStorePlain]: treesize reduction 75, result has 91.6 percent of original size [2021-03-10 23:58:57,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:57,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:57,549 INFO L354 Elim1Store]: treesize reduction 14, result has 65.9 percent of original size [2021-03-10 23:58:57,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-03-10 23:58:57,556 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:57,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:57,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:57,611 INFO L354 Elim1Store]: treesize reduction 18, result has 56.1 percent of original size [2021-03-10 23:58:57,612 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 [2021-03-10 23:58:57,623 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:58,227 WARN L205 SmtUtils]: Spent 603.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2021-03-10 23:58:58,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:58:58,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:58,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:58,300 INFO L354 Elim1Store]: treesize reduction 14, result has 65.9 percent of original size [2021-03-10 23:58:58,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-03-10 23:58:58,308 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:58,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:58,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:58,353 INFO L354 Elim1Store]: treesize reduction 31, result has 24.4 percent of original size [2021-03-10 23:58:58,353 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 [2021-03-10 23:58:58,355 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:58,921 WARN L205 SmtUtils]: Spent 564.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2021-03-10 23:58:58,921 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:58:58,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:58,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:58,979 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:58:58,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-03-10 23:58:58,996 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:59,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:59,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:59,050 INFO L354 Elim1Store]: treesize reduction 18, result has 56.1 percent of original size [2021-03-10 23:58:59,050 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 [2021-03-10 23:58:59,057 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:59,596 WARN L205 SmtUtils]: Spent 538.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-03-10 23:58:59,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:58:59,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:59,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:59,669 INFO L354 Elim1Store]: treesize reduction 14, result has 65.9 percent of original size [2021-03-10 23:58:59,669 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 [2021-03-10 23:58:59,676 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 23:58:59,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:59,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:58:59,739 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-03-10 23:58:59,739 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 [2021-03-10 23:58:59,747 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 23:59:00,829 WARN L205 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 132 DAG size of output: 130 [2021-03-10 23:59:00,829 INFO L628 ElimStorePlain]: treesize reduction 17, result has 97.5 percent of original size [2021-03-10 23:59:00,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:59:00,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:59:00,888 INFO L354 Elim1Store]: treesize reduction 22, result has 46.3 percent of original size [2021-03-10 23:59:00,888 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 [2021-03-10 23:59:00,891 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 23:59:00,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:59:00,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:59:00,942 INFO L354 Elim1Store]: treesize reduction 18, result has 56.1 percent of original size [2021-03-10 23:59:00,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-03-10 23:59:00,949 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 23:59:01,916 WARN L205 SmtUtils]: Spent 966.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 119 [2021-03-10 23:59:01,917 INFO L628 ElimStorePlain]: treesize reduction 46, result has 92.9 percent of original size [2021-03-10 23:59:01,942 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 14 xjuncts. [2021-03-10 23:59:01,942 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:953, output treesize:1025 [2021-03-10 23:59:02,629 WARN L205 SmtUtils]: Spent 623.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 45 [2021-03-10 23:59:02,849 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-03-10 23:59:02,911 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:59:02,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:59:02,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-03-10 23:59:02,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235812008] [2021-03-10 23:59:02,911 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 23:59:02,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:59:02,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 23:59:02,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-03-10 23:59:02,912 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) [2021-03-10 23:59:03,467 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 39 [2021-03-10 23:59:03,680 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 35 [2021-03-10 23:59:04,087 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 38 [2021-03-10 23:59:04,478 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 38 [2021-03-10 23:59:04,659 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 36 [2021-03-10 23:59:04,816 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-03-10 23:59:05,075 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2021-03-10 23:59:05,395 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-03-10 23:59:05,561 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-03-10 23:59:05,707 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-03-10 23:59:05,874 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 39 [2021-03-10 23:59:06,147 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2021-03-10 23:59:06,515 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 32 [2021-03-10 23:59:06,740 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-03-10 23:59:07,028 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-03-10 23:59:07,240 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2021-03-10 23:59:07,729 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 45 [2021-03-10 23:59:11,076 WARN L205 SmtUtils]: Spent 3.22 s on a formula simplification. DAG size of input: 81 DAG size of output: 68 [2021-03-10 23:59:11,242 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 31 [2021-03-10 23:59:11,746 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 40 [2021-03-10 23:59:18,285 WARN L205 SmtUtils]: Spent 6.39 s on a formula simplification. DAG size of input: 121 DAG size of output: 69 [2021-03-10 23:59:18,492 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-03-10 23:59:19,085 WARN L205 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-03-10 23:59:19,493 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2021-03-10 23:59:19,726 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 30 [2021-03-10 23:59:19,946 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 34 [2021-03-10 23:59:20,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:59:20,112 INFO L93 Difference]: Finished difference Result 2935 states and 9497 transitions. [2021-03-10 23:59:20,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-10 23:59:20,113 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 [2021-03-10 23:59:20,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:59:20,117 INFO L225 Difference]: With dead ends: 2935 [2021-03-10 23:59:20,117 INFO L226 Difference]: Without dead ends: 2890 [2021-03-10 23:59:20,117 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1011 ImplicationChecksByTransitivity, 17888.5ms TimeCoverageRelationStatistics Valid=621, Invalid=2919, Unknown=0, NotChecked=0, Total=3540 [2021-03-10 23:59:20,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2890 states. [2021-03-10 23:59:20,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2890 to 1811. [2021-03-10 23:59:20,140 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) [2021-03-10 23:59:20,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1811 states to 1811 states and 6131 transitions. [2021-03-10 23:59:20,143 INFO L78 Accepts]: Start accepts. Automaton has 1811 states and 6131 transitions. Word has length 26 [2021-03-10 23:59:20,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:59:20,143 INFO L480 AbstractCegarLoop]: Abstraction has 1811 states and 6131 transitions. [2021-03-10 23:59:20,143 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) [2021-03-10 23:59:20,143 INFO L276 IsEmpty]: Start isEmpty. Operand 1811 states and 6131 transitions. [2021-03-10 23:59:20,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:59:20,145 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:59:20,145 INFO L519 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] [2021-03-10 23:59:20,346 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1882 [2021-03-10 23:59:20,346 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:59:20,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:59:20,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1813857782, now seen corresponding path program 52 times [2021-03-10 23:59:20,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:59:20,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545671663] [2021-03-10 23:59:20,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:59:20,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:59:20,575 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 35 [2021-03-10 23:59:20,714 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-03-10 23:59:20,884 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 32 [2021-03-10 23:59:21,011 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-03-10 23:59:21,242 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:59:21,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545671663] [2021-03-10 23:59:21,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162158542] [2021-03-10 23:59:21,242 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 [2021-03-10 23:59:21,260 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:59:21,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:59:21,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-10 23:59:21,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:59:21,925 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-03-10 23:59:22,176 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_212], 6=[v_prenex_210, v_prenex_214]} [2021-03-10 23:59:22,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:59:22,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:59:22,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:59:22,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:59:22,192 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 27 treesize of output 13 [2021-03-10 23:59:22,194 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:59:22,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:59:22,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:59:22,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:59:22,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-10 23:59:22,206 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:59:22,444 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-03-10 23:59:22,445 INFO L628 ElimStorePlain]: treesize reduction 154, result has 43.2 percent of original size [2021-03-10 23:59:22,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:59:22,451 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 [2021-03-10 23:59:22,454 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:59:22,541 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:59:22,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:59:22,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:59:22,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:59:22,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:59:22,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-03-10 23:59:22,552 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 23:59:22,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:59:22,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:59:22,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:59:22,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:59:22,627 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 25 treesize of output 13 [2021-03-10 23:59:22,629 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 23:59:22,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:59:22,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 23:59:22,689 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:337, output treesize:55 [2021-03-10 23:59:22,789 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:59:22,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:59:22,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-03-10 23:59:22,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019909471] [2021-03-10 23:59:22,789 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 23:59:22,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:59:22,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 23:59:22,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-03-10 23:59:22,789 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) [2021-03-10 23:59:23,313 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 24 [2021-03-10 23:59:23,670 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 32 [2021-03-10 23:59:23,828 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 28 [2021-03-10 23:59:24,002 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 26 [2021-03-10 23:59:24,295 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 33 [2021-03-10 23:59:24,463 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 35 [2021-03-10 23:59:24,629 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-03-10 23:59:24,881 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-03-10 23:59:25,132 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 37 [2021-03-10 23:59:25,289 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2021-03-10 23:59:25,572 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-03-10 23:59:25,814 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2021-03-10 23:59:26,050 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 37 [2021-03-10 23:59:26,351 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 48 [2021-03-10 23:59:26,742 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 43 [2021-03-10 23:59:27,043 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 44 [2021-03-10 23:59:27,339 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-03-10 23:59:27,939 WARN L205 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2021-03-10 23:59:28,415 WARN L205 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2021-03-10 23:59:28,919 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2021-03-10 23:59:28,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:59:28,966 INFO L93 Difference]: Finished difference Result 2331 states and 7684 transitions. [2021-03-10 23:59:28,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 23:59:28,967 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 [2021-03-10 23:59:28,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:59:28,970 INFO L225 Difference]: With dead ends: 2331 [2021-03-10 23:59:28,971 INFO L226 Difference]: Without dead ends: 2316 [2021-03-10 23:59:28,971 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 6441.2ms TimeCoverageRelationStatistics Valid=421, Invalid=1835, Unknown=0, NotChecked=0, Total=2256 [2021-03-10 23:59:28,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2316 states. [2021-03-10 23:59:28,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2316 to 1809. [2021-03-10 23:59:28,989 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) [2021-03-10 23:59:28,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1809 states to 1809 states and 6124 transitions. [2021-03-10 23:59:28,992 INFO L78 Accepts]: Start accepts. Automaton has 1809 states and 6124 transitions. Word has length 26 [2021-03-10 23:59:28,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:59:28,992 INFO L480 AbstractCegarLoop]: Abstraction has 1809 states and 6124 transitions. [2021-03-10 23:59:28,993 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) [2021-03-10 23:59:28,993 INFO L276 IsEmpty]: Start isEmpty. Operand 1809 states and 6124 transitions. [2021-03-10 23:59:28,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:59:28,995 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:59:28,995 INFO L519 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] [2021-03-10 23:59:29,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1967,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:59:29,196 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:59:29,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:59:29,196 INFO L82 PathProgramCache]: Analyzing trace with hash -782211534, now seen corresponding path program 53 times [2021-03-10 23:59:29,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:59:29,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910327421] [2021-03-10 23:59:29,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:59:29,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:59:29,844 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2021-03-10 23:59:30,004 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2021-03-10 23:59:30,115 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:59:30,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910327421] [2021-03-10 23:59:30,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531388788] [2021-03-10 23:59:30,115 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 [2021-03-10 23:59:30,134 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 23:59:30,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:59:30,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 23:59:30,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:59:31,496 WARN L205 SmtUtils]: Spent 923.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-03-10 23:59:31,926 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-03-10 23:59:32,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:59:32,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:59:32,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:59:32,375 INFO L354 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2021-03-10 23:59:32,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-03-10 23:59:32,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:59:32,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:59:32,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:59:32,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:59:32,436 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:59:32,437 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 [2021-03-10 23:59:32,450 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:59:33,285 WARN L205 SmtUtils]: Spent 834.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-03-10 23:59:33,286 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:59:33,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:59:33,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:59:33,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:59:33,357 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:59:33,358 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 43 treesize of output 51 [2021-03-10 23:59:33,367 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:59:33,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:59:33,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:59:33,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:59:33,429 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-03-10 23:59:33,430 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 [2021-03-10 23:59:33,437 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 23:59:35,882 WARN L205 SmtUtils]: Spent 2.44 s on a formula simplification. DAG size of input: 164 DAG size of output: 155 [2021-03-10 23:59:35,883 INFO L628 ElimStorePlain]: treesize reduction 48, result has 94.7 percent of original size [2021-03-10 23:59:35,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:59:35,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:59:35,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:59:35,954 INFO L354 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2021-03-10 23:59:35,954 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 [2021-03-10 23:59:35,957 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 23:59:35,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:59:35,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:59:35,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:59:36,017 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-03-10 23:59:36,018 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 [2021-03-10 23:59:36,026 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 23:59:37,436 WARN L205 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 146 DAG size of output: 143 [2021-03-10 23:59:37,437 INFO L628 ElimStorePlain]: treesize reduction 42, result has 94.8 percent of original size [2021-03-10 23:59:37,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:59:37,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:59:37,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:59:37,512 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-03-10 23:59:37,513 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 37 [2021-03-10 23:59:37,517 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 23:59:37,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:59:37,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:59:37,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:59:37,570 INFO L354 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2021-03-10 23:59:37,570 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 34 treesize of output 30 [2021-03-10 23:59:37,574 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 23:59:38,235 WARN L205 SmtUtils]: Spent 661.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2021-03-10 23:59:38,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:59:38,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:59:38,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:59:38,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:59:38,304 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:59:38,304 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 43 treesize of output 51 [2021-03-10 23:59:38,317 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 23:59:38,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:59:38,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:59:38,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:59:38,348 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-03-10 23:59:38,348 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 [2021-03-10 23:59:38,350 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 23:59:39,011 WARN L205 SmtUtils]: Spent 661.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 23:59:39,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:59:39,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:59:39,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:59:39,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:59:39,083 INFO L354 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2021-03-10 23:59:39,083 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 [2021-03-10 23:59:39,089 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 23:59:39,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:59:39,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:59:39,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:59:39,163 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-03-10 23:59:39,163 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 43 treesize of output 37 [2021-03-10 23:59:39,176 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 23:59:39,834 WARN L205 SmtUtils]: Spent 657.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-03-10 23:59:39,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:59:39,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:59:39,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:59:39,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:59:39,904 INFO L354 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2021-03-10 23:59:39,904 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 [2021-03-10 23:59:39,908 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 23:59:39,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:59:39,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:59:39,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:59:39,962 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-03-10 23:59:39,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-03-10 23:59:39,971 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 23:59:41,020 WARN L205 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 112 DAG size of output: 109 [2021-03-10 23:59:41,021 INFO L628 ElimStorePlain]: treesize reduction 42, result has 92.7 percent of original size [2021-03-10 23:59:41,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:59:41,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:59:41,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:59:41,089 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-03-10 23:59:41,090 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 [2021-03-10 23:59:41,099 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 23:59:41,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:59:41,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:59:41,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:59:41,170 INFO L354 Elim1Store]: treesize reduction 4, result has 87.9 percent of original size [2021-03-10 23:59:41,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-03-10 23:59:41,178 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 23:59:41,734 WARN L205 SmtUtils]: Spent 555.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-03-10 23:59:41,735 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:59:41,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-03-10 23:59:41,756 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:953, output treesize:554 [2021-03-10 23:59:42,088 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 25 [2021-03-10 23:59:42,226 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:59:42,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:59:42,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-03-10 23:59:42,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799739658] [2021-03-10 23:59:42,227 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 23:59:42,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:59:42,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 23:59:42,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:59:42,227 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) [2021-03-10 23:59:43,136 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2021-03-10 23:59:43,364 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 35 [2021-03-10 23:59:43,865 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2021-03-10 23:59:44,406 WARN L205 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2021-03-10 23:59:44,639 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 36 [2021-03-10 23:59:45,427 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-03-10 23:59:45,669 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2021-03-10 23:59:45,863 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-03-10 23:59:46,114 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 44 [2021-03-10 23:59:46,502 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-03-10 23:59:46,805 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2021-03-10 23:59:47,100 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-03-10 23:59:52,241 WARN L205 SmtUtils]: Spent 4.90 s on a formula simplification. DAG size of input: 86 DAG size of output: 68 [2021-03-10 23:59:52,450 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 32 [2021-03-10 23:59:52,705 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-03-11 00:00:03,555 WARN L205 SmtUtils]: Spent 10.61 s on a formula simplification. DAG size of input: 93 DAG size of output: 69 [2021-03-11 00:00:11,975 WARN L205 SmtUtils]: Spent 8.24 s on a formula simplification. DAG size of input: 181 DAG size of output: 117 [2021-03-11 00:00:12,887 WARN L205 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2021-03-11 00:00:13,201 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-03-11 00:00:13,735 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2021-03-11 00:00:13,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:13,970 INFO L93 Difference]: Finished difference Result 2608 states and 8601 transitions. [2021-03-11 00:00:13,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-11 00:00:13,973 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 [2021-03-11 00:00:13,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:13,977 INFO L225 Difference]: With dead ends: 2608 [2021-03-11 00:00:13,977 INFO L226 Difference]: Without dead ends: 2578 [2021-03-11 00:00:13,977 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 32428.6ms TimeCoverageRelationStatistics Valid=430, Invalid=2120, Unknown=0, NotChecked=0, Total=2550 [2021-03-11 00:00:13,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2578 states. [2021-03-11 00:00:13,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2578 to 1812. [2021-03-11 00:00:14,000 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) [2021-03-11 00:00:14,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1812 states to 1812 states and 6136 transitions. [2021-03-11 00:00:14,004 INFO L78 Accepts]: Start accepts. Automaton has 1812 states and 6136 transitions. Word has length 26 [2021-03-11 00:00:14,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:14,004 INFO L480 AbstractCegarLoop]: Abstraction has 1812 states and 6136 transitions. [2021-03-11 00:00:14,004 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) [2021-03-11 00:00:14,004 INFO L276 IsEmpty]: Start isEmpty. Operand 1812 states and 6136 transitions. [2021-03-11 00:00:14,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:00:14,006 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:14,006 INFO L519 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] [2021-03-11 00:00:14,206 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1981 [2021-03-11 00:00:14,207 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:14,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:14,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1072819888, now seen corresponding path program 54 times [2021-03-11 00:00:14,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:14,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622540239] [2021-03-11 00:00:14,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:14,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:14,586 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-03-11 00:00:14,868 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 29 [2021-03-11 00:00:15,165 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 33 [2021-03-11 00:00:15,358 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-03-11 00:00:15,531 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-03-11 00:00:15,648 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:15,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622540239] [2021-03-11 00:00:15,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181960089] [2021-03-11 00:00:15,649 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 [2021-03-11 00:00:15,669 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-11 00:00:15,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:00:15,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:00:15,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:16,180 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-11 00:00:16,402 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-11 00:00:17,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:17,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:17,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:17,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:17,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:17,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:17,318 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 [2021-03-11 00:00:17,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:17,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:17,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:17,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:17,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:17,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:17,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:17,344 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 [2021-03-11 00:00:17,347 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:17,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:17,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:17,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:17,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:17,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:17,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:17,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-03-11 00:00:17,381 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:17,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:17,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:17,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:17,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:17,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:17,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:17,405 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 [2021-03-11 00:00:17,407 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:17,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:17,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:17,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:17,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:17,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:17,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:17,453 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 [2021-03-11 00:00:17,456 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:17,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:17,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:17,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:17,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:17,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:17,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:17,483 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 [2021-03-11 00:00:17,487 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:17,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:17,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:17,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:17,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:17,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:17,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:17,518 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 [2021-03-11 00:00:17,521 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:17,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:17,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:17,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:17,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:17,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:17,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:17,555 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 [2021-03-11 00:00:17,558 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:17,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:17,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:17,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:17,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:17,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:17,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:17,583 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 [2021-03-11 00:00:17,586 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:17,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:17,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:17,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:17,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:17,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:17,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:17,611 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 [2021-03-11 00:00:17,617 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:17,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:17,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:17,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:17,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:17,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:17,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:17,644 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 [2021-03-11 00:00:17,647 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:17,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:17,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:17,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:17,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:17,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:17,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:17,673 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 41 treesize of output 16 [2021-03-11 00:00:17,676 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:17,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:17,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:17,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:17,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:17,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:17,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:17,700 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 [2021-03-11 00:00:17,702 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:17,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:17,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:17,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:17,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:17,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:17,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:17,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-03-11 00:00:17,730 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:17,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:17,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:17,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:17,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:17,759 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 [2021-03-11 00:00:17,762 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:17,862 INFO L628 ElimStorePlain]: treesize reduction 16, result has 62.8 percent of original size [2021-03-11 00:00:17,864 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-11 00:00:17,865 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-03-11 00:00:17,992 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:17,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:17,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-03-11 00:00:17,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325434774] [2021-03-11 00:00:17,993 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:00:17,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:17,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:00:17,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:00:17,993 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) [2021-03-11 00:00:18,202 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 21 [2021-03-11 00:00:18,484 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2021-03-11 00:00:18,713 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-03-11 00:00:19,054 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-11 00:00:19,243 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-03-11 00:00:19,594 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 47 [2021-03-11 00:00:19,929 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 44 [2021-03-11 00:00:20,271 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-03-11 00:00:20,571 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 39 [2021-03-11 00:00:20,868 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-03-11 00:00:21,374 WARN L205 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-03-11 00:00:21,844 WARN L205 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-03-11 00:00:22,164 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-03-11 00:00:22,749 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2021-03-11 00:00:23,086 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2021-03-11 00:00:23,420 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-03-11 00:00:23,901 WARN L205 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2021-03-11 00:00:24,277 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-03-11 00:00:24,763 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2021-03-11 00:00:25,217 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2021-03-11 00:00:25,857 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2021-03-11 00:00:26,593 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-03-11 00:00:27,162 WARN L205 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2021-03-11 00:00:27,889 WARN L205 SmtUtils]: Spent 645.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-03-11 00:00:28,894 WARN L205 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 55 [2021-03-11 00:00:29,569 WARN L205 SmtUtils]: Spent 587.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2021-03-11 00:00:30,547 WARN L205 SmtUtils]: Spent 779.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 55 [2021-03-11 00:00:31,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:31,365 INFO L93 Difference]: Finished difference Result 2406 states and 7706 transitions. [2021-03-11 00:00:31,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-11 00:00:31,367 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 [2021-03-11 00:00:31,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:31,371 INFO L225 Difference]: With dead ends: 2406 [2021-03-11 00:00:31,371 INFO L226 Difference]: Without dead ends: 2376 [2021-03-11 00:00:31,371 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 12484.7ms TimeCoverageRelationStatistics Valid=436, Invalid=1820, Unknown=0, NotChecked=0, Total=2256 [2021-03-11 00:00:31,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2376 states. [2021-03-11 00:00:31,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2376 to 1827. [2021-03-11 00:00:31,390 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) [2021-03-11 00:00:31,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1827 states to 1827 states and 6199 transitions. [2021-03-11 00:00:31,393 INFO L78 Accepts]: Start accepts. Automaton has 1827 states and 6199 transitions. Word has length 26 [2021-03-11 00:00:31,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:31,393 INFO L480 AbstractCegarLoop]: Abstraction has 1827 states and 6199 transitions. [2021-03-11 00:00:31,394 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) [2021-03-11 00:00:31,394 INFO L276 IsEmpty]: Start isEmpty. Operand 1827 states and 6199 transitions. [2021-03-11 00:00:31,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:00:31,396 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:31,396 INFO L519 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] [2021-03-11 00:00:31,596 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2051,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:31,596 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:31,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:31,596 INFO L82 PathProgramCache]: Analyzing trace with hash 376151132, now seen corresponding path program 55 times [2021-03-11 00:00:31,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:31,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282266798] [2021-03-11 00:00:31,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:31,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:31,995 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-03-11 00:00:32,247 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 27 [2021-03-11 00:00:32,474 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 32 [2021-03-11 00:00:32,718 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-03-11 00:00:32,865 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2021-03-11 00:00:32,974 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:32,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282266798] [2021-03-11 00:00:32,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778619785] [2021-03-11 00:00:32,974 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 [2021-03-11 00:00:32,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:32,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:00:32,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:33,510 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-11 00:00:33,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:33,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:33,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:33,681 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-03-11 00:00:33,681 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 [2021-03-11 00:00:33,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:33,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:33,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:33,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:33,779 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-03-11 00:00:33,780 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 [2021-03-11 00:00:33,784 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:33,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:33,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:33,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:33,872 INFO L354 Elim1Store]: treesize reduction 24, result has 22.6 percent of original size [2021-03-11 00:00:33,873 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 [2021-03-11 00:00:33,877 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:33,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:33,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:33,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:33,974 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-03-11 00:00:33,974 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 [2021-03-11 00:00:33,981 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:33,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:34,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:34,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:34,043 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-03-11 00:00:34,043 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 [2021-03-11 00:00:34,046 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:34,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:34,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:34,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:34,178 INFO L354 Elim1Store]: treesize reduction 12, result has 61.3 percent of original size [2021-03-11 00:00:34,178 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 [2021-03-11 00:00:34,191 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:34,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:34,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:34,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:34,276 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-03-11 00:00:34,277 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 [2021-03-11 00:00:34,279 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:34,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:34,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:34,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:34,329 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-03-11 00:00:34,329 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 [2021-03-11 00:00:34,331 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:34,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:34,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:34,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:34,381 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-03-11 00:00:34,381 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 [2021-03-11 00:00:34,384 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:34,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:34,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:34,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:34,479 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-03-11 00:00:34,479 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 [2021-03-11 00:00:34,483 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:34,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:34,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:34,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:34,577 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:00:34,577 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 [2021-03-11 00:00:34,600 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:34,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:34,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:34,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:34,658 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-03-11 00:00:34,658 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 [2021-03-11 00:00:34,661 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:34,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:34,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:34,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:34,716 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-03-11 00:00:34,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-03-11 00:00:34,719 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:34,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:34,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:34,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:34,796 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-03-11 00:00:34,797 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 34 treesize of output 1 [2021-03-11 00:00:34,800 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:34,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:34,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:34,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:34,857 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-03-11 00:00:34,857 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 [2021-03-11 00:00:34,860 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:34,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:34,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:34,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:34,890 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-03-11 00:00:34,891 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 [2021-03-11 00:00:34,893 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:35,192 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2021-03-11 00:00:35,193 INFO L628 ElimStorePlain]: treesize reduction 76, result has 55.0 percent of original size [2021-03-11 00:00:35,195 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:00:35,196 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:753, output treesize:93 [2021-03-11 00:00:35,403 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2021-03-11 00:00:35,518 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:35,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:35,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-03-11 00:00:35,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042315142] [2021-03-11 00:00:35,519 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:00:35,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:35,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:00:35,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:00:35,519 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) [2021-03-11 00:00:35,801 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 26 [2021-03-11 00:00:35,957 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 20 [2021-03-11 00:00:36,206 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 32 [2021-03-11 00:00:36,506 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 32 [2021-03-11 00:00:36,897 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 35 [2021-03-11 00:00:37,135 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 31 [2021-03-11 00:00:37,740 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-03-11 00:00:38,033 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 36 [2021-03-11 00:00:38,353 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 35 [2021-03-11 00:00:38,649 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 29 [2021-03-11 00:00:39,297 WARN L205 SmtUtils]: Spent 593.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2021-03-11 00:00:39,573 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2021-03-11 00:00:39,937 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-03-11 00:00:40,367 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 38 [2021-03-11 00:00:40,651 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2021-03-11 00:00:41,236 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2021-03-11 00:00:42,059 WARN L205 SmtUtils]: Spent 690.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2021-03-11 00:00:42,295 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-11 00:00:42,686 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2021-03-11 00:00:43,157 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 37 [2021-03-11 00:00:43,576 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 45 [2021-03-11 00:00:43,780 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2021-03-11 00:00:44,236 WARN L205 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2021-03-11 00:00:44,770 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 44 [2021-03-11 00:00:45,389 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-03-11 00:00:45,764 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-03-11 00:00:46,434 WARN L205 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-03-11 00:00:46,977 WARN L205 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2021-03-11 00:00:47,504 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2021-03-11 00:00:48,283 WARN L205 SmtUtils]: Spent 618.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 54 [2021-03-11 00:00:48,957 WARN L205 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2021-03-11 00:00:49,242 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 25 [2021-03-11 00:00:49,921 WARN L205 SmtUtils]: Spent 615.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2021-03-11 00:00:50,550 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 32 [2021-03-11 00:00:50,869 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2021-03-11 00:00:50,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:00:50,938 INFO L93 Difference]: Finished difference Result 3227 states and 10321 transitions. [2021-03-11 00:00:50,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-11 00:00:50,941 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 [2021-03-11 00:00:50,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:00:50,946 INFO L225 Difference]: With dead ends: 3227 [2021-03-11 00:00:50,946 INFO L226 Difference]: Without dead ends: 3193 [2021-03-11 00:00:50,946 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1008 ImplicationChecksByTransitivity, 15154.5ms TimeCoverageRelationStatistics Valid=711, Invalid=2595, Unknown=0, NotChecked=0, Total=3306 [2021-03-11 00:00:50,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3193 states. [2021-03-11 00:00:50,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3193 to 1832. [2021-03-11 00:00:50,973 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) [2021-03-11 00:00:50,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1832 states to 1832 states and 6224 transitions. [2021-03-11 00:00:50,976 INFO L78 Accepts]: Start accepts. Automaton has 1832 states and 6224 transitions. Word has length 26 [2021-03-11 00:00:50,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:00:50,976 INFO L480 AbstractCegarLoop]: Abstraction has 1832 states and 6224 transitions. [2021-03-11 00:00:50,976 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) [2021-03-11 00:00:50,977 INFO L276 IsEmpty]: Start isEmpty. Operand 1832 states and 6224 transitions. [2021-03-11 00:00:50,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:00:50,979 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:00:50,979 INFO L519 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] [2021-03-11 00:00:51,179 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2165,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:00:51,179 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:00:51,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:00:51,180 INFO L82 PathProgramCache]: Analyzing trace with hash 871796194, now seen corresponding path program 28 times [2021-03-11 00:00:51,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:00:51,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789512987] [2021-03-11 00:00:51,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:00:51,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:00:51,674 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-03-11 00:00:51,948 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-03-11 00:00:52,201 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2021-03-11 00:00:52,379 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2021-03-11 00:00:52,583 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-03-11 00:00:52,586 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:52,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789512987] [2021-03-11 00:00:52,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006793491] [2021-03-11 00:00:52,586 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 [2021-03-11 00:00:52,605 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:00:52,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:00:52,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:00:52,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:00:53,114 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-11 00:00:53,364 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-11 00:00:53,573 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-11 00:00:53,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:53,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:53,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:53,871 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 28 treesize of output 16 [2021-03-11 00:00:53,874 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:53,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:53,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:53,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:53,895 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 26 treesize of output 13 [2021-03-11 00:00:53,900 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:53,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:53,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:53,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:53,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:00:53,921 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:53,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:53,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:53,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:53,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-11 00:00:53,942 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:53,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:53,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:53,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:53,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:00:53,961 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:53,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:53,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:53,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:53,979 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:00:53,982 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:53,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:53,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:54,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:54,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:00:54,008 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:54,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:54,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:54,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:54,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:00:54,033 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:54,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:54,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:54,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:54,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:00:54,057 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:54,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:54,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:54,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:54,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:00:54,083 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:54,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:54,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:54,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:54,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:00:54,108 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:54,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:54,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:54,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:54,128 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 33 treesize of output 19 [2021-03-11 00:00:54,132 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:54,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:54,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:54,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:54,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:00:54,155 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:54,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:54,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:54,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:54,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:00:54,176 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:54,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:00:54,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:00:54,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:00:54,191 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:00:54,507 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-03-11 00:00:54,508 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-03-11 00:00:54,511 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:00:54,512 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-03-11 00:00:54,687 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2021-03-11 00:00:54,727 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:00:54,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:00:54,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-03-11 00:00:54,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938367173] [2021-03-11 00:00:54,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:00:54,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:00:54,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:00:54,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:00:54,728 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) [2021-03-11 00:00:55,081 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 28 [2021-03-11 00:00:55,743 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-03-11 00:00:55,915 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-03-11 00:00:56,190 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 35 [2021-03-11 00:00:56,795 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2021-03-11 00:00:57,422 WARN L205 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2021-03-11 00:00:57,975 WARN L205 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-03-11 00:00:58,180 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-11 00:00:58,820 WARN L205 SmtUtils]: Spent 525.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-03-11 00:00:59,333 WARN L205 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2021-03-11 00:00:59,762 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-03-11 00:01:00,559 WARN L205 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 52 [2021-03-11 00:01:00,738 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-11 00:01:01,271 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-03-11 00:01:01,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:01:01,777 INFO L93 Difference]: Finished difference Result 2398 states and 7951 transitions. [2021-03-11 00:01:01,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-11 00:01:01,780 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 [2021-03-11 00:01:01,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:01:01,784 INFO L225 Difference]: With dead ends: 2398 [2021-03-11 00:01:01,784 INFO L226 Difference]: Without dead ends: 2383 [2021-03-11 00:01:01,784 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 7388.3ms TimeCoverageRelationStatistics Valid=195, Invalid=995, Unknown=0, NotChecked=0, Total=1190 [2021-03-11 00:01:01,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2383 states. [2021-03-11 00:01:01,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2383 to 1847. [2021-03-11 00:01:01,804 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) [2021-03-11 00:01:01,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1847 states to 1847 states and 6271 transitions. [2021-03-11 00:01:01,807 INFO L78 Accepts]: Start accepts. Automaton has 1847 states and 6271 transitions. Word has length 26 [2021-03-11 00:01:01,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:01:01,807 INFO L480 AbstractCegarLoop]: Abstraction has 1847 states and 6271 transitions. [2021-03-11 00:01:01,807 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) [2021-03-11 00:01:01,807 INFO L276 IsEmpty]: Start isEmpty. Operand 1847 states and 6271 transitions. [2021-03-11 00:01:01,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:01:01,810 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:01:01,810 INFO L519 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] [2021-03-11 00:01:02,010 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2190,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:01:02,010 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:01:02,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:01:02,010 INFO L82 PathProgramCache]: Analyzing trace with hash 224636922, now seen corresponding path program 29 times [2021-03-11 00:01:02,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:01:02,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208218500] [2021-03-11 00:01:02,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:01:02,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:01:02,438 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-03-11 00:01:02,669 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-03-11 00:01:02,821 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2021-03-11 00:01:03,020 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-03-11 00:01:03,146 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:03,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208218500] [2021-03-11 00:01:03,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088713095] [2021-03-11 00:01:03,146 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 [2021-03-11 00:01:03,173 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:01:03,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:01:03,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:01:03,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:01:03,680 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-11 00:01:03,890 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-11 00:01:03,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:04,012 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:01:04,012 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 [2021-03-11 00:01:04,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:04,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:04,044 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:01:04,045 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 [2021-03-11 00:01:04,048 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:04,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:04,091 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:01:04,092 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 [2021-03-11 00:01:04,097 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:04,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:04,125 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:01:04,125 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 [2021-03-11 00:01:04,128 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:04,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:04,167 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:04,168 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 33 treesize of output 27 [2021-03-11 00:01:04,171 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:04,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:04,216 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:01:04,216 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 21 treesize of output 17 [2021-03-11 00:01:04,222 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:04,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:04,275 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:01:04,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-11 00:01:04,278 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:04,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:04,318 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:04,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-03-11 00:01:04,323 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:04,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:04,352 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:01:04,352 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 [2021-03-11 00:01:04,355 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:04,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:04,394 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:04,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-11 00:01:04,408 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:04,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:04,438 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:01:04,438 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 [2021-03-11 00:01:04,441 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:04,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:04,481 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:04,482 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 33 treesize of output 27 [2021-03-11 00:01:04,489 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:04,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:04,531 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:01:04,531 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 [2021-03-11 00:01:04,536 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:04,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:04,575 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:04,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-11 00:01:04,590 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:04,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:04,618 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:01:04,618 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 [2021-03-11 00:01:04,621 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:04,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:04,638 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:01:04,638 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 [2021-03-11 00:01:04,641 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:04,925 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-11 00:01:04,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:04,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:01:04,929 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-03-11 00:01:05,219 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-11 00:01:05,522 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 20 [2021-03-11 00:01:05,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:05,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:01:05,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-03-11 00:01:05,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937596860] [2021-03-11 00:01:05,575 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:01:05,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:01:05,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:01:05,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:01:05,576 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) [2021-03-11 00:01:06,001 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 28 [2021-03-11 00:01:06,810 WARN L205 SmtUtils]: Spent 530.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2021-03-11 00:01:07,151 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-03-11 00:01:07,443 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 30 [2021-03-11 00:01:08,384 WARN L205 SmtUtils]: Spent 687.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 42 [2021-03-11 00:01:08,551 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-03-11 00:01:09,331 WARN L205 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-03-11 00:01:09,927 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 50 [2021-03-11 00:01:10,847 WARN L205 SmtUtils]: Spent 817.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2021-03-11 00:01:11,535 WARN L205 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 54 [2021-03-11 00:01:12,327 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-11 00:01:12,953 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-03-11 00:01:14,009 WARN L205 SmtUtils]: Spent 984.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2021-03-11 00:01:14,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:01:14,431 INFO L93 Difference]: Finished difference Result 2710 states and 8888 transitions. [2021-03-11 00:01:14,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-11 00:01:14,435 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 [2021-03-11 00:01:14,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:01:14,438 INFO L225 Difference]: With dead ends: 2710 [2021-03-11 00:01:14,438 INFO L226 Difference]: Without dead ends: 2680 [2021-03-11 00:01:14,439 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 9209.0ms TimeCoverageRelationStatistics Valid=235, Invalid=1097, Unknown=0, NotChecked=0, Total=1332 [2021-03-11 00:01:14,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2680 states. [2021-03-11 00:01:14,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2680 to 1853. [2021-03-11 00:01:14,461 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) [2021-03-11 00:01:14,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1853 states to 1853 states and 6295 transitions. [2021-03-11 00:01:14,464 INFO L78 Accepts]: Start accepts. Automaton has 1853 states and 6295 transitions. Word has length 26 [2021-03-11 00:01:14,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:01:14,465 INFO L480 AbstractCegarLoop]: Abstraction has 1853 states and 6295 transitions. [2021-03-11 00:01:14,465 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) [2021-03-11 00:01:14,465 INFO L276 IsEmpty]: Start isEmpty. Operand 1853 states and 6295 transitions. [2021-03-11 00:01:14,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:01:14,467 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:01:14,467 INFO L519 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] [2021-03-11 00:01:14,671 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2222 [2021-03-11 00:01:14,671 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:01:14,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:01:14,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1531090714, now seen corresponding path program 30 times [2021-03-11 00:01:14,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:01:14,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318904261] [2021-03-11 00:01:14,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:01:14,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:01:15,186 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2021-03-11 00:01:15,413 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2021-03-11 00:01:15,621 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-03-11 00:01:15,825 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-03-11 00:01:15,937 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:15,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318904261] [2021-03-11 00:01:15,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815876754] [2021-03-11 00:01:15,937 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 [2021-03-11 00:01:15,958 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:01:15,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:01:15,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:01:15,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:01:16,464 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-11 00:01:16,671 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-11 00:01:16,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:16,799 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:01:16,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-11 00:01:16,802 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:16,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:16,846 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:01:16,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-11 00:01:16,850 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:16,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:16,896 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:01:16,896 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 21 treesize of output 17 [2021-03-11 00:01:16,902 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:16,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:16,932 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:01:16,932 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 [2021-03-11 00:01:16,935 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:16,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:16,979 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:16,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-11 00:01:16,983 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:16,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:17,030 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:01:17,031 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 [2021-03-11 00:01:17,036 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:17,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:17,068 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:01:17,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-11 00:01:17,071 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:17,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:17,114 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:17,114 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 [2021-03-11 00:01:17,119 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:17,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:17,149 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:01:17,150 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 [2021-03-11 00:01:17,153 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:17,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:17,195 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:17,195 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 [2021-03-11 00:01:17,210 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:17,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:17,240 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:01:17,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-03-11 00:01:17,244 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:17,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:17,286 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:17,286 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 [2021-03-11 00:01:17,294 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:17,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:17,339 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:01:17,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-11 00:01:17,344 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:17,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:17,384 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:17,385 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 [2021-03-11 00:01:17,400 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:17,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:17,430 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:01:17,430 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 [2021-03-11 00:01:17,434 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:17,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:17,452 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:01:17,452 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 31 treesize of output 19 [2021-03-11 00:01:17,455 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:17,749 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-11 00:01:17,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:17,753 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:01:17,753 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-03-11 00:01:18,109 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-11 00:01:18,362 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 20 [2021-03-11 00:01:18,405 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:18,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:01:18,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-03-11 00:01:18,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435384904] [2021-03-11 00:01:18,406 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:01:18,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:01:18,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:01:18,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:01:18,406 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) [2021-03-11 00:01:18,796 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 28 [2021-03-11 00:01:19,482 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2021-03-11 00:01:19,882 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2021-03-11 00:01:20,196 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 30 [2021-03-11 00:01:20,533 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-11 00:01:21,755 WARN L205 SmtUtils]: Spent 948.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 48 [2021-03-11 00:01:22,326 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 38 [2021-03-11 00:01:22,857 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 36 [2021-03-11 00:01:23,472 WARN L205 SmtUtils]: Spent 520.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2021-03-11 00:01:24,325 WARN L205 SmtUtils]: Spent 524.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 55 [2021-03-11 00:01:25,619 WARN L205 SmtUtils]: Spent 963.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-03-11 00:01:26,418 WARN L205 SmtUtils]: Spent 685.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 66 [2021-03-11 00:01:27,148 WARN L205 SmtUtils]: Spent 647.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 41 [2021-03-11 00:01:27,581 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-11 00:01:28,675 WARN L205 SmtUtils]: Spent 673.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-03-11 00:01:29,843 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 80 DAG size of output: 61 [2021-03-11 00:01:30,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:01:30,290 INFO L93 Difference]: Finished difference Result 2506 states and 8354 transitions. [2021-03-11 00:01:30,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:01:30,293 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 [2021-03-11 00:01:30,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:01:30,297 INFO L225 Difference]: With dead ends: 2506 [2021-03-11 00:01:30,297 INFO L226 Difference]: Without dead ends: 2491 [2021-03-11 00:01:30,297 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 11718.0ms TimeCoverageRelationStatistics Valid=268, Invalid=1292, Unknown=0, NotChecked=0, Total=1560 [2021-03-11 00:01:30,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2491 states. [2021-03-11 00:01:30,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2491 to 1849. [2021-03-11 00:01:30,320 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) [2021-03-11 00:01:30,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1849 states to 1849 states and 6275 transitions. [2021-03-11 00:01:30,323 INFO L78 Accepts]: Start accepts. Automaton has 1849 states and 6275 transitions. Word has length 26 [2021-03-11 00:01:30,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:01:30,323 INFO L480 AbstractCegarLoop]: Abstraction has 1849 states and 6275 transitions. [2021-03-11 00:01:30,323 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) [2021-03-11 00:01:30,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1849 states and 6275 transitions. [2021-03-11 00:01:30,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:01:30,326 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:01:30,326 INFO L519 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] [2021-03-11 00:01:30,541 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2239,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:01:30,541 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:01:30,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:01:30,541 INFO L82 PathProgramCache]: Analyzing trace with hash 663462910, now seen corresponding path program 31 times [2021-03-11 00:01:30,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:01:30,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775320688] [2021-03-11 00:01:30,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:01:30,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:01:31,033 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-03-11 00:01:31,191 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2021-03-11 00:01:31,383 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-03-11 00:01:31,566 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2021-03-11 00:01:31,670 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:31,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775320688] [2021-03-11 00:01:31,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027110405] [2021-03-11 00:01:31,671 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 [2021-03-11 00:01:31,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:01:31,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:01:31,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:01:32,197 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-11 00:01:32,424 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-11 00:01:32,660 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-11 00:01:33,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:33,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:33,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:33,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-11 00:01:33,042 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:33,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:33,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:33,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:33,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:01:33,069 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:33,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:33,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:33,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:33,093 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-03-11 00:01:33,096 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:33,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:33,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:33,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:33,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:01:33,122 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:33,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:33,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:33,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:33,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:01:33,149 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:33,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:33,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:33,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:33,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:01:33,175 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:33,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:33,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:33,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:33,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:01:33,205 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:33,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:33,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:33,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:33,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:01:33,234 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:33,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:33,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:33,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:33,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:01:33,265 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:33,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:33,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:33,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:33,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:01:33,296 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:33,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:33,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:33,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:33,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-11 00:01:33,321 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:33,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:33,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:33,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:33,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:01:33,350 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:33,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:33,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:33,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:33,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:01:33,369 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:33,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:33,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:33,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:33,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-11 00:01:33,394 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:33,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:33,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:01:33,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-11 00:01:33,407 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:33,743 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2021-03-11 00:01:33,744 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-03-11 00:01:33,748 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:01:33,749 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-03-11 00:01:33,922 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2021-03-11 00:01:33,964 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:33,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:01:33,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:01:33,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984607273] [2021-03-11 00:01:33,964 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:01:33,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:01:33,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:01:33,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:01:33,964 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) [2021-03-11 00:01:34,155 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 25 [2021-03-11 00:01:34,918 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-11 00:01:35,408 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-11 00:01:35,704 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-11 00:01:36,107 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-03-11 00:01:36,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:01:36,156 INFO L93 Difference]: Finished difference Result 2303 states and 7667 transitions. [2021-03-11 00:01:36,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-11 00:01:36,160 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 [2021-03-11 00:01:36,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:01:36,163 INFO L225 Difference]: With dead ends: 2303 [2021-03-11 00:01:36,163 INFO L226 Difference]: Without dead ends: 2282 [2021-03-11 00:01:36,163 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 3233.6ms TimeCoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2021-03-11 00:01:36,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2282 states. [2021-03-11 00:01:36,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2282 to 1864. [2021-03-11 00:01:36,183 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) [2021-03-11 00:01:36,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1864 states to 1864 states and 6332 transitions. [2021-03-11 00:01:36,186 INFO L78 Accepts]: Start accepts. Automaton has 1864 states and 6332 transitions. Word has length 26 [2021-03-11 00:01:36,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:01:36,186 INFO L480 AbstractCegarLoop]: Abstraction has 1864 states and 6332 transitions. [2021-03-11 00:01:36,186 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) [2021-03-11 00:01:36,187 INFO L276 IsEmpty]: Start isEmpty. Operand 1864 states and 6332 transitions. [2021-03-11 00:01:36,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:01:36,189 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:01:36,189 INFO L519 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] [2021-03-11 00:01:36,391 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2256 [2021-03-11 00:01:36,391 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:01:36,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:01:36,391 INFO L82 PathProgramCache]: Analyzing trace with hash 495653818, now seen corresponding path program 32 times [2021-03-11 00:01:36,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:01:36,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687123225] [2021-03-11 00:01:36,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:01:36,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:01:36,938 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-03-11 00:01:37,131 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 29 [2021-03-11 00:01:37,465 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-03-11 00:01:37,771 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-03-11 00:01:37,881 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:37,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687123225] [2021-03-11 00:01:37,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099294317] [2021-03-11 00:01:37,881 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 [2021-03-11 00:01:37,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:01:37,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:01:37,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-11 00:01:37,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:01:38,794 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-11 00:01:39,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:39,566 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:01:39,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:01:39,580 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:39,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:39,641 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:39,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:01:39,662 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:40,299 WARN L205 SmtUtils]: Spent 637.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-03-11 00:01:40,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:40,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:40,400 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:01:40,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:01:40,406 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:40,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:40,482 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:01:40,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-11 00:01:40,491 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:41,109 WARN L205 SmtUtils]: Spent 618.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-03-11 00:01:41,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:41,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:41,211 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:01:41,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-03-11 00:01:41,215 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:41,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:41,298 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:01:41,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-11 00:01:41,303 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:41,926 WARN L205 SmtUtils]: Spent 622.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-03-11 00:01:41,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:41,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:42,004 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:42,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:01:42,020 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:42,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:42,080 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:42,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-11 00:01:42,105 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:43,266 WARN L205 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2021-03-11 00:01:43,267 INFO L628 ElimStorePlain]: treesize reduction 17, result has 93.7 percent of original size [2021-03-11 00:01:43,314 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:01:43,315 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:357, output treesize:292 [2021-03-11 00:01:44,238 WARN L205 SmtUtils]: Spent 839.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-03-11 00:01:44,594 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2021-03-11 00:01:44,660 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:44,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:01:44,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-03-11 00:01:44,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109793408] [2021-03-11 00:01:44,661 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:01:44,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:01:44,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:01:44,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:01:44,661 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) [2021-03-11 00:01:45,157 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-11 00:01:45,538 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 40 [2021-03-11 00:01:45,931 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2021-03-11 00:01:47,326 WARN L205 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2021-03-11 00:01:47,876 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 41 [2021-03-11 00:01:48,811 WARN L205 SmtUtils]: Spent 652.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2021-03-11 00:01:49,465 WARN L205 SmtUtils]: Spent 500.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-03-11 00:01:50,173 WARN L205 SmtUtils]: Spent 588.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2021-03-11 00:01:51,345 WARN L205 SmtUtils]: Spent 643.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 37 [2021-03-11 00:01:51,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:01:51,520 INFO L93 Difference]: Finished difference Result 2295 states and 7632 transitions. [2021-03-11 00:01:51,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-11 00:01:51,523 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 [2021-03-11 00:01:51,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:01:51,527 INFO L225 Difference]: With dead ends: 2295 [2021-03-11 00:01:51,527 INFO L226 Difference]: Without dead ends: 2266 [2021-03-11 00:01:51,527 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 8908.8ms TimeCoverageRelationStatistics Valid=153, Invalid=659, Unknown=0, NotChecked=0, Total=812 [2021-03-11 00:01:51,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2266 states. [2021-03-11 00:01:51,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2266 to 1849. [2021-03-11 00:01:51,548 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) [2021-03-11 00:01:51,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1849 states to 1849 states and 6275 transitions. [2021-03-11 00:01:51,551 INFO L78 Accepts]: Start accepts. Automaton has 1849 states and 6275 transitions. Word has length 26 [2021-03-11 00:01:51,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:01:51,551 INFO L480 AbstractCegarLoop]: Abstraction has 1849 states and 6275 transitions. [2021-03-11 00:01:51,551 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) [2021-03-11 00:01:51,552 INFO L276 IsEmpty]: Start isEmpty. Operand 1849 states and 6275 transitions. [2021-03-11 00:01:51,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:01:51,554 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:01:51,554 INFO L519 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] [2021-03-11 00:01:51,754 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2290 [2021-03-11 00:01:51,754 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:01:51,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:01:51,755 INFO L82 PathProgramCache]: Analyzing trace with hash 794427266, now seen corresponding path program 33 times [2021-03-11 00:01:51,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:01:51,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158523455] [2021-03-11 00:01:51,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:01:51,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:01:52,260 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2021-03-11 00:01:52,449 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-03-11 00:01:52,598 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 19 [2021-03-11 00:01:52,781 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2021-03-11 00:01:52,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:01:52,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158523455] [2021-03-11 00:01:52,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465330343] [2021-03-11 00:01:52,895 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 [2021-03-11 00:01:52,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:01:52,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:01:52,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-11 00:01:52,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:01:53,842 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-11 00:01:54,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:54,624 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:01:54,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-11 00:01:54,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:54,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:54,722 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:01:54,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:01:54,738 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:55,383 WARN L205 SmtUtils]: Spent 644.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-03-11 00:01:55,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:55,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:55,459 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:55,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-11 00:01:55,481 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:55,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:55,565 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:01:55,565 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-03-11 00:01:55,572 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:56,168 WARN L205 SmtUtils]: Spent 596.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-03-11 00:01:56,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:56,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:56,248 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:56,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-11 00:01:56,272 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:56,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:56,338 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:01:56,339 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:01:56,344 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:57,484 WARN L205 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2021-03-11 00:01:57,485 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.8 percent of original size [2021-03-11 00:01:57,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:57,559 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:01:57,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-11 00:01:57,573 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:57,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:01:57,654 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:01:57,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:01:57,659 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:01:58,716 WARN L205 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-03-11 00:01:58,717 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.5 percent of original size [2021-03-11 00:01:58,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:01:58,762 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:349, output treesize:259 [2021-03-11 00:01:59,566 WARN L205 SmtUtils]: Spent 730.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-03-11 00:01:59,927 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 20 [2021-03-11 00:02:00,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:02:00,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:02:00,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-03-11 00:02:00,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495651260] [2021-03-11 00:02:00,001 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:02:00,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:02:00,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:02:00,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:02:00,002 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) [2021-03-11 00:02:00,568 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 33 [2021-03-11 00:02:00,964 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-03-11 00:02:01,448 WARN L205 SmtUtils]: Spent 416.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-11 00:02:01,869 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2021-03-11 00:02:02,406 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-11 00:02:03,085 WARN L205 SmtUtils]: Spent 588.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-03-11 00:02:03,947 WARN L205 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 30 [2021-03-11 00:02:04,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:02:04,128 INFO L93 Difference]: Finished difference Result 2056 states and 6874 transitions. [2021-03-11 00:02:04,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-11 00:02:04,131 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 [2021-03-11 00:02:04,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:02:04,134 INFO L225 Difference]: With dead ends: 2056 [2021-03-11 00:02:04,134 INFO L226 Difference]: Without dead ends: 2031 [2021-03-11 00:02:04,134 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 5759.2ms TimeCoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2021-03-11 00:02:04,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2031 states. [2021-03-11 00:02:04,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2031 to 1831. [2021-03-11 00:02:04,153 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) [2021-03-11 00:02:04,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1831 states to 1831 states and 6221 transitions. [2021-03-11 00:02:04,157 INFO L78 Accepts]: Start accepts. Automaton has 1831 states and 6221 transitions. Word has length 26 [2021-03-11 00:02:04,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:02:04,157 INFO L480 AbstractCegarLoop]: Abstraction has 1831 states and 6221 transitions. [2021-03-11 00:02:04,157 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) [2021-03-11 00:02:04,157 INFO L276 IsEmpty]: Start isEmpty. Operand 1831 states and 6221 transitions. [2021-03-11 00:02:04,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:02:04,159 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:02:04,159 INFO L519 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] [2021-03-11 00:02:04,359 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2335,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:02:04,360 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:02:04,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:02:04,360 INFO L82 PathProgramCache]: Analyzing trace with hash 939333122, now seen corresponding path program 34 times [2021-03-11 00:02:04,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:02:04,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759147125] [2021-03-11 00:02:04,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:02:04,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:02:04,976 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2021-03-11 00:02:05,211 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-11 00:02:05,361 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-11 00:02:05,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:02:05,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759147125] [2021-03-11 00:02:05,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239798012] [2021-03-11 00:02:05,624 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 [2021-03-11 00:02:05,642 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:02:05,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:02:05,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-11 00:02:05,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:02:06,240 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-11 00:02:07,075 WARN L205 SmtUtils]: Spent 527.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2021-03-11 00:02:07,470 INFO L446 ElimStorePlain]: Different costs {2=[A, v_prenex_261], 3=[v_prenex_260, v_prenex_262]} [2021-03-11 00:02:07,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:07,521 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:07,522 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 33 treesize of output 27 [2021-03-11 00:02:07,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:07,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:07,566 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:07,567 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 33 treesize of output 27 [2021-03-11 00:02:07,575 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:08,204 WARN L205 SmtUtils]: Spent 627.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-03-11 00:02:08,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:08,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:08,257 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:02:08,257 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 [2021-03-11 00:02:08,264 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:08,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:08,299 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:08,299 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 [2021-03-11 00:02:08,305 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:08,888 WARN L205 SmtUtils]: Spent 582.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-03-11 00:02:08,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:08,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:08,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:08,946 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-03-11 00:02:08,946 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 [2021-03-11 00:02:08,953 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:08,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:08,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:08,992 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:08,992 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 18 treesize of output 20 [2021-03-11 00:02:09,010 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:09,555 WARN L205 SmtUtils]: Spent 544.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-03-11 00:02:09,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:09,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:09,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:09,614 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-03-11 00:02:09,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-11 00:02:09,619 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:09,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:09,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:09,657 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:09,658 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 [2021-03-11 00:02:09,675 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:10,172 WARN L205 SmtUtils]: Spent 496.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-03-11 00:02:10,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:10,189 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:02:10,189 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:357, output treesize:194 [2021-03-11 00:02:10,669 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-11 00:02:11,050 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 22 [2021-03-11 00:02:11,146 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:02:11,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:02:11,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-11 00:02:11,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384730959] [2021-03-11 00:02:11,146 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:02:11,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:02:11,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:02:11,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:02:11,147 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) [2021-03-11 00:02:12,253 WARN L205 SmtUtils]: Spent 781.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 45 [2021-03-11 00:02:13,218 WARN L205 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 33 [2021-03-11 00:02:13,742 WARN L205 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 39 [2021-03-11 00:02:14,162 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-03-11 00:02:14,759 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-11 00:02:15,244 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-03-11 00:02:16,021 WARN L205 SmtUtils]: Spent 409.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-11 00:02:16,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:02:16,306 INFO L93 Difference]: Finished difference Result 2461 states and 8160 transitions. [2021-03-11 00:02:16,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-11 00:02:16,310 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 [2021-03-11 00:02:16,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:02:16,313 INFO L225 Difference]: With dead ends: 2461 [2021-03-11 00:02:16,313 INFO L226 Difference]: Without dead ends: 2436 [2021-03-11 00:02:16,314 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 6771.2ms TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2021-03-11 00:02:16,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2436 states. [2021-03-11 00:02:16,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2436 to 1819. [2021-03-11 00:02:16,335 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) [2021-03-11 00:02:16,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1819 states to 1819 states and 6179 transitions. [2021-03-11 00:02:16,339 INFO L78 Accepts]: Start accepts. Automaton has 1819 states and 6179 transitions. Word has length 26 [2021-03-11 00:02:16,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:02:16,339 INFO L480 AbstractCegarLoop]: Abstraction has 1819 states and 6179 transitions. [2021-03-11 00:02:16,339 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) [2021-03-11 00:02:16,339 INFO L276 IsEmpty]: Start isEmpty. Operand 1819 states and 6179 transitions. [2021-03-11 00:02:16,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:02:16,355 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:02:16,355 INFO L519 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] [2021-03-11 00:02:16,570 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2391,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:02:16,570 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:02:16,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:02:16,570 INFO L82 PathProgramCache]: Analyzing trace with hash 305289786, now seen corresponding path program 35 times [2021-03-11 00:02:16,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:02:16,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123294568] [2021-03-11 00:02:16,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:02:16,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:02:17,018 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-03-11 00:02:17,274 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2021-03-11 00:02:17,562 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2021-03-11 00:02:17,824 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2021-03-11 00:02:18,003 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 12 [2021-03-11 00:02:18,006 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:02:18,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123294568] [2021-03-11 00:02:18,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337388662] [2021-03-11 00:02:18,007 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 [2021-03-11 00:02:18,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:02:18,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:02:18,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:02:18,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:02:18,760 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-11 00:02:19,004 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-11 00:02:19,329 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-11 00:02:19,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:19,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:19,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:19,772 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 33 treesize of output 19 [2021-03-11 00:02:19,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:19,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:19,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:19,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:19,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:02:19,801 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:19,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:19,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:19,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:19,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:02:19,826 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:19,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:19,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:19,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:19,846 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 [2021-03-11 00:02:19,850 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:19,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:19,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:19,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:19,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-11 00:02:19,874 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:19,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:19,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:19,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:19,896 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:02:19,900 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:19,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:19,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:19,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:19,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:02:19,932 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:19,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:19,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:19,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:19,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:02:19,956 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:19,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:19,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:19,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:19,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-11 00:02:19,985 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:19,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:19,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:20,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:20,006 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 28 treesize of output 16 [2021-03-11 00:02:20,011 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:20,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:20,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:20,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:20,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:02:20,036 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:20,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:20,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:20,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:20,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:02:20,060 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:20,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:20,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:20,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:20,075 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 28 treesize of output 16 [2021-03-11 00:02:20,079 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:20,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:20,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:20,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:20,099 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 26 treesize of output 13 [2021-03-11 00:02:20,103 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:20,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:20,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:20,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:02:20,121 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:20,498 WARN L205 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-03-11 00:02:20,500 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-03-11 00:02:20,504 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:02:20,504 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-03-11 00:02:20,702 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2021-03-11 00:02:20,749 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:02:20,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:02:20,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-11 00:02:20,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129628985] [2021-03-11 00:02:20,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:02:20,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:02:20,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:02:20,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:02:20,750 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) [2021-03-11 00:02:21,014 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 25 [2021-03-11 00:02:21,515 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-11 00:02:22,122 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 39 [2021-03-11 00:02:22,603 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2021-03-11 00:02:23,499 WARN L205 SmtUtils]: Spent 638.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2021-03-11 00:02:24,224 WARN L205 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2021-03-11 00:02:24,567 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-11 00:02:24,899 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-11 00:02:25,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:02:25,011 INFO L93 Difference]: Finished difference Result 2320 states and 7724 transitions. [2021-03-11 00:02:25,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-11 00:02:25,015 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 [2021-03-11 00:02:25,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:02:25,018 INFO L225 Difference]: With dead ends: 2320 [2021-03-11 00:02:25,018 INFO L226 Difference]: Without dead ends: 2305 [2021-03-11 00:02:25,018 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 5703.6ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-03-11 00:02:25,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2305 states. [2021-03-11 00:02:25,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2305 to 1855. [2021-03-11 00:02:25,040 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) [2021-03-11 00:02:25,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1855 states to 1855 states and 6287 transitions. [2021-03-11 00:02:25,043 INFO L78 Accepts]: Start accepts. Automaton has 1855 states and 6287 transitions. Word has length 26 [2021-03-11 00:02:25,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:02:25,044 INFO L480 AbstractCegarLoop]: Abstraction has 1855 states and 6287 transitions. [2021-03-11 00:02:25,044 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) [2021-03-11 00:02:25,044 INFO L276 IsEmpty]: Start isEmpty. Operand 1855 states and 6287 transitions. [2021-03-11 00:02:25,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:02:25,046 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:02:25,046 INFO L519 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] [2021-03-11 00:02:25,246 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2423 [2021-03-11 00:02:25,247 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:02:25,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:02:25,247 INFO L82 PathProgramCache]: Analyzing trace with hash 137480694, now seen corresponding path program 36 times [2021-03-11 00:02:25,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:02:25,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388865115] [2021-03-11 00:02:25,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:02:25,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:02:25,724 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-03-11 00:02:25,985 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-03-11 00:02:26,163 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-11 00:02:26,313 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 16 [2021-03-11 00:02:26,449 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 12 [2021-03-11 00:02:26,453 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:02:26,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388865115] [2021-03-11 00:02:26,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958415945] [2021-03-11 00:02:26,453 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 [2021-03-11 00:02:26,473 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-11 00:02:26,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:02:26,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-11 00:02:26,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:02:27,036 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-03-11 00:02:27,287 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-11 00:02:27,781 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:02:27,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:02:27,788 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:27,890 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:02:27,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:02:27,896 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:27,936 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-11 00:02:27,936 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:02:27,940 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:27,976 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-11 00:02:27,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-11 00:02:27,980 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:28,054 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:28,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:02:28,059 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:28,134 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:28,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-11 00:02:28,144 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:28,184 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-11 00:02:28,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:02:28,188 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:28,229 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-11 00:02:28,229 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 36 treesize of output 22 [2021-03-11 00:02:28,234 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:28,276 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-11 00:02:28,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-11 00:02:28,281 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:28,385 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:02:28,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:02:28,401 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:28,493 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:02:28,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:02:28,499 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:28,539 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-11 00:02:28,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:02:28,543 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:28,642 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:02:28,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-11 00:02:28,660 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:28,698 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-11 00:02:28,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:02:28,702 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:28,765 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:28,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-11 00:02:28,797 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:28,819 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-03-11 00:02:28,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-11 00:02:28,824 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:29,376 WARN L205 SmtUtils]: Spent 552.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-11 00:02:29,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:29,411 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:02:29,411 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:769, output treesize:376 [2021-03-11 00:02:30,482 WARN L205 SmtUtils]: Spent 992.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-03-11 00:02:31,471 WARN L205 SmtUtils]: Spent 891.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-03-11 00:02:31,936 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 20 [2021-03-11 00:02:31,977 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:02:31,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:02:31,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-03-11 00:02:31,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233279734] [2021-03-11 00:02:31,978 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:02:31,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:02:31,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:02:31,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:02:31,978 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) [2021-03-11 00:02:32,277 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 25 [2021-03-11 00:02:32,692 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2021-03-11 00:02:32,990 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2021-03-11 00:02:34,454 WARN L205 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2021-03-11 00:02:35,156 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-03-11 00:02:35,593 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2021-03-11 00:02:36,496 WARN L205 SmtUtils]: Spent 587.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2021-03-11 00:02:36,740 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-11 00:02:37,484 WARN L205 SmtUtils]: Spent 609.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-03-11 00:02:39,052 WARN L205 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-03-11 00:02:40,305 WARN L205 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 68 DAG size of output: 35 [2021-03-11 00:02:40,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:02:40,667 INFO L93 Difference]: Finished difference Result 2577 states and 8546 transitions. [2021-03-11 00:02:40,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-11 00:02:40,671 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 [2021-03-11 00:02:40,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:02:40,676 INFO L225 Difference]: With dead ends: 2577 [2021-03-11 00:02:40,676 INFO L226 Difference]: Without dead ends: 2562 [2021-03-11 00:02:40,676 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 11153.4ms TimeCoverageRelationStatistics Valid=201, Invalid=791, Unknown=0, NotChecked=0, Total=992 [2021-03-11 00:02:40,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2562 states. [2021-03-11 00:02:40,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2562 to 1865. [2021-03-11 00:02:40,699 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) [2021-03-11 00:02:40,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1865 states to 1865 states and 6329 transitions. [2021-03-11 00:02:40,702 INFO L78 Accepts]: Start accepts. Automaton has 1865 states and 6329 transitions. Word has length 26 [2021-03-11 00:02:40,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:02:40,703 INFO L480 AbstractCegarLoop]: Abstraction has 1865 states and 6329 transitions. [2021-03-11 00:02:40,703 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) [2021-03-11 00:02:40,703 INFO L276 IsEmpty]: Start isEmpty. Operand 1865 states and 6329 transitions. [2021-03-11 00:02:40,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:02:40,705 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:02:40,705 INFO L519 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] [2021-03-11 00:02:40,905 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2457 [2021-03-11 00:02:40,906 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:02:40,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:02:40,906 INFO L82 PathProgramCache]: Analyzing trace with hash 436254142, now seen corresponding path program 37 times [2021-03-11 00:02:40,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:02:40,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033341306] [2021-03-11 00:02:40,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:02:40,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:02:41,367 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-03-11 00:02:41,582 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 23 [2021-03-11 00:02:41,780 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 18 [2021-03-11 00:02:41,932 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:02:41,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033341306] [2021-03-11 00:02:41,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423413249] [2021-03-11 00:02:41,933 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 [2021-03-11 00:02:41,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:02:41,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:02:41,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:02:42,494 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-11 00:02:42,671 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-11 00:02:43,010 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-11 00:02:43,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:43,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:43,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:43,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:02:43,248 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:43,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:43,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:43,262 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 28 treesize of output 16 [2021-03-11 00:02:43,267 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:43,882 WARN L205 SmtUtils]: Spent 614.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 45 [2021-03-11 00:02:43,883 INFO L628 ElimStorePlain]: treesize reduction 100, result has 55.6 percent of original size [2021-03-11 00:02:43,884 INFO L518 ElimStorePlain]: Eliminatee v_prenex_263 vanished before elimination [2021-03-11 00:02:43,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:43,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:43,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-11 00:02:43,903 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:44,172 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-11 00:02:44,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:44,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:44,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:44,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:44,198 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 [2021-03-11 00:02:44,203 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:44,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:44,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:02:44,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:02:44,221 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:44,418 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-11 00:02:44,420 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:44,427 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:02:44,427 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:264, output treesize:51 [2021-03-11 00:02:44,656 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2021-03-11 00:02:44,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:02:44,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:02:44,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-03-11 00:02:44,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185621462] [2021-03-11 00:02:44,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:02:44,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:02:44,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:02:44,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:02:44,742 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) [2021-03-11 00:02:45,304 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-03-11 00:02:45,818 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2021-03-11 00:02:46,064 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-03-11 00:02:46,341 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-03-11 00:02:46,790 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 43 [2021-03-11 00:02:47,122 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 33 [2021-03-11 00:02:48,247 WARN L205 SmtUtils]: Spent 587.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-03-11 00:02:48,693 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-11 00:02:48,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:02:48,856 INFO L93 Difference]: Finished difference Result 2506 states and 8276 transitions. [2021-03-11 00:02:48,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 00:02:48,860 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 [2021-03-11 00:02:48,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:02:48,864 INFO L225 Difference]: With dead ends: 2506 [2021-03-11 00:02:48,864 INFO L226 Difference]: Without dead ends: 2476 [2021-03-11 00:02:48,865 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 4885.0ms TimeCoverageRelationStatistics Valid=208, Invalid=722, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:02:48,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2476 states. [2021-03-11 00:02:48,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2476 to 1867. [2021-03-11 00:02:48,886 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) [2021-03-11 00:02:48,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1867 states to 1867 states and 6339 transitions. [2021-03-11 00:02:48,890 INFO L78 Accepts]: Start accepts. Automaton has 1867 states and 6339 transitions. Word has length 26 [2021-03-11 00:02:48,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:02:48,890 INFO L480 AbstractCegarLoop]: Abstraction has 1867 states and 6339 transitions. [2021-03-11 00:02:48,890 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) [2021-03-11 00:02:48,890 INFO L276 IsEmpty]: Start isEmpty. Operand 1867 states and 6339 transitions. [2021-03-11 00:02:48,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:02:48,892 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:02:48,892 INFO L519 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] [2021-03-11 00:02:49,093 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2511 [2021-03-11 00:02:49,093 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:02:49,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:02:49,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1514157122, now seen corresponding path program 38 times [2021-03-11 00:02:49,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:02:49,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176920478] [2021-03-11 00:02:49,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:02:49,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:02:49,586 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-03-11 00:02:49,967 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-03-11 00:02:50,302 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2021-03-11 00:02:50,439 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 16 [2021-03-11 00:02:50,572 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:02:50,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176920478] [2021-03-11 00:02:50,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180391764] [2021-03-11 00:02:50,573 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 [2021-03-11 00:02:50,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:02:50,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:02:50,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-11 00:02:50,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:02:51,398 WARN L205 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-03-11 00:02:51,717 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-03-11 00:02:52,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:52,692 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:52,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-11 00:02:52,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:52,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:52,820 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:02:52,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:02:52,827 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:54,129 WARN L205 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 79 DAG size of output: 78 [2021-03-11 00:02:54,130 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.4 percent of original size [2021-03-11 00:02:54,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:54,234 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:02:54,234 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-03-11 00:02:54,239 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:54,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:54,307 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:54,308 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-03-11 00:02:54,323 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:55,710 WARN L205 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2021-03-11 00:02:55,711 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.1 percent of original size [2021-03-11 00:02:55,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:55,807 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:02:55,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:02:55,814 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:55,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:55,878 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:55,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:02:55,901 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:56,517 WARN L205 SmtUtils]: Spent 615.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-03-11 00:02:56,518 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:56,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:56,634 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:02:56,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:02:56,640 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:56,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:02:56,733 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:02:56,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:02:56,750 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:02:57,359 WARN L205 SmtUtils]: Spent 608.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-03-11 00:02:57,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:02:57,412 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:02:57,413 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:365, output treesize:253 [2021-03-11 00:02:58,458 WARN L205 SmtUtils]: Spent 959.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-03-11 00:02:58,832 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 22 [2021-03-11 00:02:58,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:02:58,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:02:58,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-11 00:02:58,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257241809] [2021-03-11 00:02:58,911 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:02:58,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:02:58,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:02:58,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:02:58,912 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) [2021-03-11 00:03:00,086 WARN L205 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 32 [2021-03-11 00:03:01,517 WARN L205 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2021-03-11 00:03:01,960 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-03-11 00:03:02,353 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-11 00:03:02,908 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-03-11 00:03:03,723 WARN L205 SmtUtils]: Spent 490.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-03-11 00:03:03,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:03:03,842 INFO L93 Difference]: Finished difference Result 2436 states and 8120 transitions. [2021-03-11 00:03:03,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-11 00:03:03,846 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 [2021-03-11 00:03:03,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:03:03,850 INFO L225 Difference]: With dead ends: 2436 [2021-03-11 00:03:03,850 INFO L226 Difference]: Without dead ends: 2421 [2021-03-11 00:03:03,851 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 7499.9ms TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2021-03-11 00:03:03,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2421 states. [2021-03-11 00:03:03,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2421 to 1885. [2021-03-11 00:03:03,872 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) [2021-03-11 00:03:03,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 6393 transitions. [2021-03-11 00:03:03,876 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 6393 transitions. Word has length 26 [2021-03-11 00:03:03,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:03:03,876 INFO L480 AbstractCegarLoop]: Abstraction has 1885 states and 6393 transitions. [2021-03-11 00:03:03,876 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) [2021-03-11 00:03:03,876 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 6393 transitions. [2021-03-11 00:03:03,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:03:03,879 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:03:03,879 INFO L519 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] [2021-03-11 00:03:04,079 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2522 [2021-03-11 00:03:04,079 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:03:04,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:03:04,079 INFO L82 PathProgramCache]: Analyzing trace with hash -714815838, now seen corresponding path program 39 times [2021-03-11 00:03:04,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:03:04,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998645964] [2021-03-11 00:03:04,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:03:04,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:03:04,573 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-03-11 00:03:04,786 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-11 00:03:05,096 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-03-11 00:03:05,363 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-03-11 00:03:05,504 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 12 [2021-03-11 00:03:05,508 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:03:05,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998645964] [2021-03-11 00:03:05,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267581016] [2021-03-11 00:03:05,508 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 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 [2021-03-11 00:03:05,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:03:05,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:03:05,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:03:05,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:03:05,926 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-11 00:03:06,310 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-11 00:03:07,288 WARN L205 SmtUtils]: Spent 617.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-03-11 00:03:08,515 WARN L205 SmtUtils]: Spent 901.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 56 [2021-03-11 00:03:08,798 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_285], 2=[A, v_prenex_284]} [2021-03-11 00:03:08,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:08,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-11 00:03:08,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:09,401 WARN L205 SmtUtils]: Spent 584.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-03-11 00:03:09,403 INFO L628 ElimStorePlain]: treesize reduction 54, result has 69.8 percent of original size [2021-03-11 00:03:09,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:09,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:09,417 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:03:09,422 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:09,684 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-11 00:03:09,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:09,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:09,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:09,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:09,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:03:09,714 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:09,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:09,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:03:09,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-11 00:03:09,735 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:09,968 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-03-11 00:03:09,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:09,977 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:03:09,977 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:193, output treesize:51 [2021-03-11 00:03:10,201 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2021-03-11 00:03:10,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:03:10,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:03:10,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-11 00:03:10,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524442820] [2021-03-11 00:03:10,290 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:03:10,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:03:10,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:03:10,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:03:10,291 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) [2021-03-11 00:03:10,543 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 25 [2021-03-11 00:03:10,877 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-11 00:03:11,622 WARN L205 SmtUtils]: Spent 587.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2021-03-11 00:03:12,375 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-11 00:03:12,746 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2021-03-11 00:03:13,301 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-11 00:03:14,386 WARN L205 SmtUtils]: Spent 677.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-03-11 00:03:15,800 WARN L205 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 101 DAG size of output: 77 [2021-03-11 00:03:16,487 WARN L205 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2021-03-11 00:03:17,035 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-03-11 00:03:17,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:03:17,119 INFO L93 Difference]: Finished difference Result 2516 states and 8289 transitions. [2021-03-11 00:03:17,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-11 00:03:17,123 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 [2021-03-11 00:03:17,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:03:17,127 INFO L225 Difference]: With dead ends: 2516 [2021-03-11 00:03:17,127 INFO L226 Difference]: Without dead ends: 2471 [2021-03-11 00:03:17,128 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 8932.1ms TimeCoverageRelationStatistics Valid=173, Invalid=697, Unknown=0, NotChecked=0, Total=870 [2021-03-11 00:03:17,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2471 states. [2021-03-11 00:03:17,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2471 to 1925. [2021-03-11 00:03:17,151 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) [2021-03-11 00:03:17,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1925 states to 1925 states and 6534 transitions. [2021-03-11 00:03:17,155 INFO L78 Accepts]: Start accepts. Automaton has 1925 states and 6534 transitions. Word has length 26 [2021-03-11 00:03:17,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:03:17,155 INFO L480 AbstractCegarLoop]: Abstraction has 1925 states and 6534 transitions. [2021-03-11 00:03:17,155 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) [2021-03-11 00:03:17,155 INFO L276 IsEmpty]: Start isEmpty. Operand 1925 states and 6534 transitions. [2021-03-11 00:03:17,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:03:17,158 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:03:17,158 INFO L519 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] [2021-03-11 00:03:17,358 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2580,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:03:17,358 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:03:17,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:03:17,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1962618678, now seen corresponding path program 40 times [2021-03-11 00:03:17,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:03:17,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943208836] [2021-03-11 00:03:17,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:03:17,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:03:17,893 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-03-11 00:03:18,086 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-11 00:03:18,379 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-03-11 00:03:18,542 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 16 [2021-03-11 00:03:18,702 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 12 [2021-03-11 00:03:18,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:03:18,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943208836] [2021-03-11 00:03:18,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863455799] [2021-03-11 00:03:18,706 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 [2021-03-11 00:03:18,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:03:18,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:03:18,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-11 00:03:18,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:03:19,095 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-11 00:03:19,474 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-11 00:03:20,413 WARN L205 SmtUtils]: Spent 589.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-03-11 00:03:20,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:20,646 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:20,646 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 [2021-03-11 00:03:20,666 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:21,196 WARN L205 SmtUtils]: Spent 529.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-03-11 00:03:21,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:21,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:21,234 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:21,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-11 00:03:21,249 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:21,684 WARN L205 SmtUtils]: Spent 434.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-03-11 00:03:21,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:21,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:21,738 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:03:21,738 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 [2021-03-11 00:03:21,745 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:22,273 WARN L205 SmtUtils]: Spent 527.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-03-11 00:03:22,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:22,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:22,319 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:22,319 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 26 treesize of output 24 [2021-03-11 00:03:22,326 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:22,865 WARN L205 SmtUtils]: Spent 539.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-03-11 00:03:22,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:22,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:22,914 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:22,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-11 00:03:22,924 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:23,460 WARN L205 SmtUtils]: Spent 535.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-03-11 00:03:23,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:23,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:23,508 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:03:23,508 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 21 treesize of output 17 [2021-03-11 00:03:23,515 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:24,014 WARN L205 SmtUtils]: Spent 497.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-03-11 00:03:24,015 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:24,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:24,059 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:03:24,060 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 [2021-03-11 00:03:24,067 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:24,544 WARN L205 SmtUtils]: Spent 476.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-03-11 00:03:24,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:24,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:24,586 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:24,586 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 [2021-03-11 00:03:24,592 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:25,080 WARN L205 SmtUtils]: Spent 488.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-03-11 00:03:25,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:25,098 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:03:25,098 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:325, output treesize:174 [2021-03-11 00:03:25,581 WARN L205 SmtUtils]: Spent 384.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-11 00:03:25,974 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 20 [2021-03-11 00:03:26,077 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:03:26,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:03:26,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-11 00:03:26,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322220854] [2021-03-11 00:03:26,077 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:03:26,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:03:26,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:03:26,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:03:26,078 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) [2021-03-11 00:03:26,329 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 25 [2021-03-11 00:03:26,668 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-11 00:03:27,588 WARN L205 SmtUtils]: Spent 768.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2021-03-11 00:03:27,882 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2021-03-11 00:03:28,345 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-11 00:03:28,980 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-11 00:03:29,976 WARN L205 SmtUtils]: Spent 654.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-03-11 00:03:31,767 WARN L205 SmtUtils]: Spent 1.57 s on a formula simplification. DAG size of input: 83 DAG size of output: 77 [2021-03-11 00:03:32,977 WARN L205 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2021-03-11 00:03:34,030 WARN L205 SmtUtils]: Spent 676.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 43 [2021-03-11 00:03:34,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:03:34,606 INFO L93 Difference]: Finished difference Result 2715 states and 8950 transitions. [2021-03-11 00:03:34,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-11 00:03:34,610 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 [2021-03-11 00:03:34,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:03:34,614 INFO L225 Difference]: With dead ends: 2715 [2021-03-11 00:03:34,615 INFO L226 Difference]: Without dead ends: 2685 [2021-03-11 00:03:34,615 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 10039.9ms TimeCoverageRelationStatistics Valid=199, Invalid=671, Unknown=0, NotChecked=0, Total=870 [2021-03-11 00:03:34,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2685 states. [2021-03-11 00:03:34,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2685 to 1914. [2021-03-11 00:03:34,650 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) [2021-03-11 00:03:34,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1914 states to 1914 states and 6494 transitions. [2021-03-11 00:03:34,653 INFO L78 Accepts]: Start accepts. Automaton has 1914 states and 6494 transitions. Word has length 26 [2021-03-11 00:03:34,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:03:34,654 INFO L480 AbstractCegarLoop]: Abstraction has 1914 states and 6494 transitions. [2021-03-11 00:03:34,654 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) [2021-03-11 00:03:34,654 INFO L276 IsEmpty]: Start isEmpty. Operand 1914 states and 6494 transitions. [2021-03-11 00:03:34,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:03:34,656 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:03:34,656 INFO L519 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] [2021-03-11 00:03:34,856 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2591,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:03:34,857 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:03:34,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:03:34,857 INFO L82 PathProgramCache]: Analyzing trace with hash 272675774, now seen corresponding path program 41 times [2021-03-11 00:03:34,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:03:34,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690501187] [2021-03-11 00:03:34,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:03:34,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:03:35,546 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-03-11 00:03:35,896 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-03-11 00:03:36,131 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2021-03-11 00:03:36,350 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 16 [2021-03-11 00:03:36,546 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 12 [2021-03-11 00:03:36,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:03:36,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690501187] [2021-03-11 00:03:36,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499451252] [2021-03-11 00:03:36,549 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 [2021-03-11 00:03:36,569 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:03:36,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:03:36,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:03:36,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:03:36,949 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-11 00:03:37,368 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-11 00:03:38,249 WARN L205 SmtUtils]: Spent 550.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-03-11 00:03:38,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:38,779 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:38,779 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 [2021-03-11 00:03:38,798 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:38,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:38,846 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:03:38,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-11 00:03:38,852 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:39,491 WARN L205 SmtUtils]: Spent 638.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-03-11 00:03:39,492 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:39,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:39,556 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:03:39,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-11 00:03:39,564 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:39,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:39,607 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:39,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-11 00:03:39,628 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:40,238 WARN L205 SmtUtils]: Spent 610.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-03-11 00:03:40,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:40,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:40,303 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:40,303 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 33 treesize of output 27 [2021-03-11 00:03:40,308 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:40,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:40,352 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:40,352 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 [2021-03-11 00:03:40,363 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:40,956 WARN L205 SmtUtils]: Spent 592.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-03-11 00:03:40,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:40,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:41,025 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:41,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-11 00:03:41,032 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:41,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:41,080 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:03:41,080 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 [2021-03-11 00:03:41,088 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:41,655 WARN L205 SmtUtils]: Spent 566.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-03-11 00:03:41,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:41,675 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:03:41,675 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:333, output treesize:174 [2021-03-11 00:03:42,170 WARN L205 SmtUtils]: Spent 404.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-11 00:03:42,596 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 20 [2021-03-11 00:03:42,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:03:42,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:03:42,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:03:42,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391050485] [2021-03-11 00:03:42,708 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:03:42,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:03:42,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:03:42,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:03:42,708 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) [2021-03-11 00:03:43,367 WARN L205 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 35 [2021-03-11 00:03:43,812 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-11 00:03:44,184 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-03-11 00:03:44,688 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-11 00:03:45,081 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-03-11 00:03:45,776 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-11 00:03:46,476 WARN L205 SmtUtils]: Spent 520.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2021-03-11 00:03:46,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:03:46,708 INFO L93 Difference]: Finished difference Result 2483 states and 8261 transitions. [2021-03-11 00:03:46,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-11 00:03:46,712 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 [2021-03-11 00:03:46,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:03:46,716 INFO L225 Difference]: With dead ends: 2483 [2021-03-11 00:03:46,717 INFO L226 Difference]: Without dead ends: 2458 [2021-03-11 00:03:46,717 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 6772.6ms TimeCoverageRelationStatistics Valid=162, Invalid=594, Unknown=0, NotChecked=0, Total=756 [2021-03-11 00:03:46,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2458 states. [2021-03-11 00:03:46,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2458 to 1918. [2021-03-11 00:03:46,740 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) [2021-03-11 00:03:46,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1918 states to 1918 states and 6508 transitions. [2021-03-11 00:03:46,744 INFO L78 Accepts]: Start accepts. Automaton has 1918 states and 6508 transitions. Word has length 26 [2021-03-11 00:03:46,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:03:46,744 INFO L480 AbstractCegarLoop]: Abstraction has 1918 states and 6508 transitions. [2021-03-11 00:03:46,744 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) [2021-03-11 00:03:46,744 INFO L276 IsEmpty]: Start isEmpty. Operand 1918 states and 6508 transitions. [2021-03-11 00:03:46,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:03:46,747 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:03:46,747 INFO L519 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] [2021-03-11 00:03:46,947 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2608 [2021-03-11 00:03:46,947 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:03:46,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:03:46,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1537750790, now seen corresponding path program 42 times [2021-03-11 00:03:46,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:03:46,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387866493] [2021-03-11 00:03:46,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:03:46,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:03:47,524 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-03-11 00:03:47,916 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-03-11 00:03:48,167 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-03-11 00:03:48,368 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 16 [2021-03-11 00:03:48,559 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 12 [2021-03-11 00:03:48,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:03:48,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387866493] [2021-03-11 00:03:48,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275626286] [2021-03-11 00:03:48,564 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 [2021-03-11 00:03:48,583 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:03:48,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:03:48,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:03:48,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:03:49,189 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-03-11 00:03:49,462 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-11 00:03:49,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:49,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:49,634 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:49,635 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 [2021-03-11 00:03:49,640 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:49,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:49,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:49,688 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:03:49,688 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 40 treesize of output 22 [2021-03-11 00:03:49,693 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:49,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:49,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:49,758 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:49,758 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 [2021-03-11 00:03:49,779 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:49,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:49,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:49,852 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:03:49,852 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 [2021-03-11 00:03:49,860 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:49,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:49,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:49,933 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:03:49,934 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 [2021-03-11 00:03:49,942 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:49,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:49,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:49,988 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:03:49,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-11 00:03:49,993 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:50,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:50,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:50,041 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:03:50,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-11 00:03:50,046 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:50,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:50,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:50,094 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:03:50,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-11 00:03:50,099 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:50,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:50,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:50,144 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:03:50,144 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 [2021-03-11 00:03:50,149 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:50,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:50,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:50,200 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:03:50,200 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 45 treesize of output 27 [2021-03-11 00:03:50,205 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:50,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:50,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:50,253 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:03:50,254 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 [2021-03-11 00:03:50,258 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:50,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:50,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:50,326 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:50,327 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 34 treesize of output 30 [2021-03-11 00:03:50,334 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:50,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:50,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:50,399 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:50,399 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 [2021-03-11 00:03:50,421 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:50,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:50,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:50,485 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:50,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-11 00:03:50,496 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:50,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:50,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:50,564 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:03:50,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-11 00:03:50,572 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:50,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:50,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:03:50,602 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:03:50,603 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 42 treesize of output 22 [2021-03-11 00:03:50,607 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:03:51,068 WARN L205 SmtUtils]: Spent 459.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-11 00:03:51,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:03:51,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:03:51,073 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:865, output treesize:221 [2021-03-11 00:03:51,633 WARN L205 SmtUtils]: Spent 453.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-11 00:03:52,142 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2021-03-11 00:03:52,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:03:52,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:03:52,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-03-11 00:03:52,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493494371] [2021-03-11 00:03:52,217 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:03:52,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:03:52,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:03:52,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:03:52,217 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) [2021-03-11 00:03:53,053 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-03-11 00:03:53,619 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 26 [2021-03-11 00:03:54,095 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 34 [2021-03-11 00:03:54,695 WARN L205 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 43 [2021-03-11 00:03:55,808 WARN L205 SmtUtils]: Spent 902.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 49 [2021-03-11 00:03:57,175 WARN L205 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-03-11 00:03:58,063 WARN L205 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 30 [2021-03-11 00:03:58,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:03:58,723 INFO L93 Difference]: Finished difference Result 2546 states and 8447 transitions. [2021-03-11 00:03:58,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-11 00:03:58,726 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 [2021-03-11 00:03:58,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:03:58,731 INFO L225 Difference]: With dead ends: 2546 [2021-03-11 00:03:58,731 INFO L226 Difference]: Without dead ends: 2510 [2021-03-11 00:03:58,731 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 8007.6ms TimeCoverageRelationStatistics Valid=172, Invalid=698, Unknown=0, NotChecked=0, Total=870 [2021-03-11 00:03:58,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2510 states. [2021-03-11 00:03:58,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2510 to 1939. [2021-03-11 00:03:58,755 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) [2021-03-11 00:03:58,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1939 states to 1939 states and 6590 transitions. [2021-03-11 00:03:58,759 INFO L78 Accepts]: Start accepts. Automaton has 1939 states and 6590 transitions. Word has length 26 [2021-03-11 00:03:58,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:03:58,759 INFO L480 AbstractCegarLoop]: Abstraction has 1939 states and 6590 transitions. [2021-03-11 00:03:58,759 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) [2021-03-11 00:03:58,759 INFO L276 IsEmpty]: Start isEmpty. Operand 1939 states and 6590 transitions. [2021-03-11 00:03:58,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:03:58,762 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:03:58,762 INFO L519 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] [2021-03-11 00:03:58,962 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2641 [2021-03-11 00:03:58,962 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:03:58,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:03:58,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1872442310, now seen corresponding path program 56 times [2021-03-11 00:03:58,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:03:58,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863341306] [2021-03-11 00:03:58,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:03:58,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:03:59,311 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2021-03-11 00:03:59,465 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 17 [2021-03-11 00:03:59,642 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2021-03-11 00:03:59,855 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 21 [2021-03-11 00:04:00,171 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2021-03-11 00:04:00,501 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2021-03-11 00:04:00,789 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-03-11 00:04:00,937 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:04:00,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863341306] [2021-03-11 00:04:00,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837116440] [2021-03-11 00:04:00,937 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 [2021-03-11 00:04:00,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:04:00,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:04:00,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-11 00:04:00,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:04:01,505 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-03-11 00:04:01,807 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-11 00:04:02,114 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-11 00:04:02,487 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-11 00:04:03,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:03,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:03,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:03,402 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 28 treesize of output 16 [2021-03-11 00:04:03,408 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:03,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:03,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:03,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:03,440 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 [2021-03-11 00:04:03,445 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:03,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:03,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:03,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:03,478 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-11 00:04:03,483 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:03,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:03,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:03,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:03,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:04:03,521 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:03,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:03,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:03,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:03,562 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:04:03,567 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:03,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:03,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:03,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:03,603 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 28 treesize of output 16 [2021-03-11 00:04:03,608 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:03,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:03,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:03,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:03,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:04:03,649 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:03,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:03,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:03,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:03,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:04:03,699 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:03,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:03,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:03,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:03,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:04:03,746 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:03,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:03,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:03,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:03,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:04:03,797 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:03,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:03,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:03,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:03,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:04:03,835 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:03,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:03,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:03,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:03,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:04:03,885 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:03,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:03,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:03,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:03,914 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 28 treesize of output 16 [2021-03-11 00:04:03,919 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:03,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:03,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:03,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:03,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:04:03,965 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:03,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:03,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:04,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:04,003 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 35 treesize of output 19 [2021-03-11 00:04:04,007 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:04,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:04,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:04,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:04,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:04:04,042 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:04,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:04,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:04,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:04,076 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 33 treesize of output 19 [2021-03-11 00:04:04,081 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:04,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:04,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:04,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:04,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:04:04,118 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:04,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:04,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:04,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:04,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-11 00:04:04,158 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:04,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:04,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:04,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:04,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:04:04,193 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:04,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:04,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:04,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:04,221 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 [2021-03-11 00:04:04,227 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:04,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:04,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:04,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:04,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:04:04,262 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:04,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:04,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:04,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:04:04,282 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:04,466 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2021-03-11 00:04:04,467 INFO L628 ElimStorePlain]: treesize reduction 48, result has 36.0 percent of original size [2021-03-11 00:04:04,472 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-11 00:04:04,472 INFO L247 ElimStorePlain]: Needed 24 recursive calls to eliminate 2 variables, input treesize:956, output treesize:21 [2021-03-11 00:04:04,645 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:04:04,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:04:04,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:04:04,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031411828] [2021-03-11 00:04:04,646 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:04:04,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:04:04,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:04:04,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:04:04,646 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) [2021-03-11 00:04:04,875 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 18 [2021-03-11 00:04:05,228 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-03-11 00:04:06,214 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-03-11 00:04:06,618 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-03-11 00:04:06,917 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-03-11 00:04:07,114 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-11 00:04:07,730 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-11 00:04:08,138 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-03-11 00:04:08,532 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-11 00:04:08,925 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 26 [2021-03-11 00:04:09,261 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 23 [2021-03-11 00:04:09,676 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-03-11 00:04:10,003 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 20 [2021-03-11 00:04:10,302 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-03-11 00:04:10,630 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2021-03-11 00:04:10,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:04:10,681 INFO L93 Difference]: Finished difference Result 2586 states and 8224 transitions. [2021-03-11 00:04:10,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-11 00:04:10,684 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 [2021-03-11 00:04:10,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:04:10,688 INFO L225 Difference]: With dead ends: 2586 [2021-03-11 00:04:10,688 INFO L226 Difference]: Without dead ends: 2556 [2021-03-11 00:04:10,688 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 7529.6ms TimeCoverageRelationStatistics Valid=284, Invalid=1198, Unknown=0, NotChecked=0, Total=1482 [2021-03-11 00:04:10,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2021-03-11 00:04:10,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 1967. [2021-03-11 00:04:10,710 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) [2021-03-11 00:04:10,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1967 states to 1967 states and 6684 transitions. [2021-03-11 00:04:10,713 INFO L78 Accepts]: Start accepts. Automaton has 1967 states and 6684 transitions. Word has length 26 [2021-03-11 00:04:10,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:04:10,713 INFO L480 AbstractCegarLoop]: Abstraction has 1967 states and 6684 transitions. [2021-03-11 00:04:10,713 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) [2021-03-11 00:04:10,713 INFO L276 IsEmpty]: Start isEmpty. Operand 1967 states and 6684 transitions. [2021-03-11 00:04:10,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:04:10,716 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:04:10,716 INFO L519 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] [2021-03-11 00:04:10,916 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2659,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:04:10,916 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:04:10,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:04:10,916 INFO L82 PathProgramCache]: Analyzing trace with hash -401364192, now seen corresponding path program 57 times [2021-03-11 00:04:10,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:04:10,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528142923] [2021-03-11 00:04:10,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:04:10,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:04:11,305 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2021-03-11 00:04:11,485 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 17 [2021-03-11 00:04:11,687 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2021-03-11 00:04:11,904 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 21 [2021-03-11 00:04:12,227 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2021-03-11 00:04:12,534 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2021-03-11 00:04:12,828 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-03-11 00:04:12,980 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:04:12,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528142923] [2021-03-11 00:04:12,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203743859] [2021-03-11 00:04:12,980 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 [2021-03-11 00:04:13,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-11 00:04:13,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:04:13,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:04:13,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:04:13,608 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-11 00:04:14,049 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-03-11 00:04:15,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:15,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:15,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:15,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:15,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:15,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:15,411 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 [2021-03-11 00:04:15,416 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:15,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:15,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:15,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:15,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:15,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:15,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:15,461 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 37 treesize of output 13 [2021-03-11 00:04:15,468 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:15,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:15,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:15,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:15,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:15,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:15,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:15,517 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 [2021-03-11 00:04:15,522 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:15,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:15,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:15,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:15,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:15,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:15,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:15,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-03-11 00:04:15,570 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:15,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:15,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:15,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:15,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:15,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:15,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:15,613 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 13 [2021-03-11 00:04:15,618 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:15,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:15,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:15,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:15,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:15,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:15,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:15,669 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 [2021-03-11 00:04:15,674 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:15,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:15,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:15,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:15,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:15,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:15,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:15,717 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 [2021-03-11 00:04:15,722 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:15,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:15,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:15,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:15,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:15,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:15,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:15,771 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 [2021-03-11 00:04:15,776 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:15,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:15,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:15,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:15,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:15,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:15,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:15,817 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 [2021-03-11 00:04:15,821 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:15,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:15,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:15,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:15,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:15,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:15,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:15,864 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 [2021-03-11 00:04:15,869 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:15,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:15,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:15,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:15,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:15,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:15,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:15,908 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 [2021-03-11 00:04:15,916 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:15,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:15,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:15,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:15,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:15,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:15,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:15,957 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 [2021-03-11 00:04:15,962 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:15,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:15,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:15,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:15,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:16,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:16,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:16,007 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 [2021-03-11 00:04:16,013 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:16,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:16,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:16,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:16,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:16,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:16,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:16,061 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 [2021-03-11 00:04:16,066 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:16,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:16,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:16,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:16,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:16,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:16,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:16,105 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 [2021-03-11 00:04:16,111 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:16,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:16,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:16,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:16,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:16,128 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 34 treesize of output 16 [2021-03-11 00:04:16,133 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:16,312 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2021-03-11 00:04:16,313 INFO L628 ElimStorePlain]: treesize reduction 32, result has 50.8 percent of original size [2021-03-11 00:04:16,318 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-11 00:04:16,318 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:761, output treesize:21 [2021-03-11 00:04:16,496 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:04:16,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:04:16,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-03-11 00:04:16,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597638053] [2021-03-11 00:04:16,496 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:04:16,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:04:16,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:04:16,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:04:16,497 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) [2021-03-11 00:04:16,723 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 18 [2021-03-11 00:04:16,989 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 25 [2021-03-11 00:04:17,316 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-03-11 00:04:17,559 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 26 [2021-03-11 00:04:17,825 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-11 00:04:18,075 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-03-11 00:04:18,767 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-11 00:04:18,990 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-11 00:04:19,463 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 33 [2021-03-11 00:04:19,938 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-11 00:04:20,401 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-03-11 00:04:20,902 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2021-03-11 00:04:21,404 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-11 00:04:22,072 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 25 [2021-03-11 00:04:22,493 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-11 00:04:22,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:04:22,570 INFO L93 Difference]: Finished difference Result 2698 states and 8750 transitions. [2021-03-11 00:04:22,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-11 00:04:22,575 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 [2021-03-11 00:04:22,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:04:22,579 INFO L225 Difference]: With dead ends: 2698 [2021-03-11 00:04:22,579 INFO L226 Difference]: Without dead ends: 2661 [2021-03-11 00:04:22,580 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 7414.9ms TimeCoverageRelationStatistics Valid=303, Invalid=1103, Unknown=0, NotChecked=0, Total=1406 [2021-03-11 00:04:22,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2661 states. [2021-03-11 00:04:22,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2661 to 1989. [2021-03-11 00:04:22,607 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) [2021-03-11 00:04:22,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1989 states to 1989 states and 6755 transitions. [2021-03-11 00:04:22,612 INFO L78 Accepts]: Start accepts. Automaton has 1989 states and 6755 transitions. Word has length 26 [2021-03-11 00:04:22,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:04:22,612 INFO L480 AbstractCegarLoop]: Abstraction has 1989 states and 6755 transitions. [2021-03-11 00:04:22,612 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) [2021-03-11 00:04:22,612 INFO L276 IsEmpty]: Start isEmpty. Operand 1989 states and 6755 transitions. [2021-03-11 00:04:22,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:04:22,614 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:04:22,614 INFO L519 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] [2021-03-11 00:04:22,821 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2728 [2021-03-11 00:04:22,822 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:04:22,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:04:22,822 INFO L82 PathProgramCache]: Analyzing trace with hash -804567746, now seen corresponding path program 58 times [2021-03-11 00:04:22,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:04:22,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231107106] [2021-03-11 00:04:22,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:04:22,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:04:23,184 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-03-11 00:04:23,346 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 17 [2021-03-11 00:04:23,518 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-03-11 00:04:23,655 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2021-03-11 00:04:23,960 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2021-03-11 00:04:24,314 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-03-11 00:04:24,492 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2021-03-11 00:04:24,664 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 13 [2021-03-11 00:04:24,668 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:04:24,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231107106] [2021-03-11 00:04:24,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220341618] [2021-03-11 00:04:24,668 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 [2021-03-11 00:04:24,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:04:24,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:04:24,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:04:24,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:04:25,289 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-11 00:04:25,967 WARN L205 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-03-11 00:04:26,221 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_310, v_prenex_312], 5=[A, v_prenex_314]} [2021-03-11 00:04:26,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:26,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:26,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:04:26,244 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:26,838 WARN L205 SmtUtils]: Spent 593.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-03-11 00:04:26,840 INFO L628 ElimStorePlain]: treesize reduction 142, result has 45.2 percent of original size [2021-03-11 00:04:26,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:26,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:26,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:04:26,862 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:27,059 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-11 00:04:27,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:04:27,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:27,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:27,075 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 29 treesize of output 13 [2021-03-11 00:04:27,080 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:27,287 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-11 00:04:27,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:04:27,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:27,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:27,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:27,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:04:27,313 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:27,470 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-03-11 00:04:27,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:04:27,479 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-11 00:04:27,480 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:294, output treesize:31 [2021-03-11 00:04:27,627 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:04:27,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:04:27,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-03-11 00:04:27,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383343891] [2021-03-11 00:04:27,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:04:27,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:04:27,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:04:27,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:04:27,628 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) [2021-03-11 00:04:27,838 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 18 [2021-03-11 00:04:28,244 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 22 [2021-03-11 00:04:28,840 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 29 [2021-03-11 00:04:29,214 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-11 00:04:29,952 WARN L205 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-03-11 00:04:30,662 WARN L205 SmtUtils]: Spent 635.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-03-11 00:04:31,185 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2021-03-11 00:04:31,627 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2021-03-11 00:04:31,909 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2021-03-11 00:04:32,436 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-11 00:04:33,181 WARN L205 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-03-11 00:04:34,115 WARN L205 SmtUtils]: Spent 765.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-03-11 00:04:34,963 WARN L205 SmtUtils]: Spent 672.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-03-11 00:04:35,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:04:35,435 INFO L93 Difference]: Finished difference Result 2419 states and 8049 transitions. [2021-03-11 00:04:35,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-11 00:04:35,440 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 [2021-03-11 00:04:35,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:04:35,444 INFO L225 Difference]: With dead ends: 2419 [2021-03-11 00:04:35,444 INFO L226 Difference]: Without dead ends: 2388 [2021-03-11 00:04:35,444 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 9230.1ms TimeCoverageRelationStatistics Valid=251, Invalid=871, Unknown=0, NotChecked=0, Total=1122 [2021-03-11 00:04:35,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2388 states. [2021-03-11 00:04:35,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2388 to 1985. [2021-03-11 00:04:35,468 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) [2021-03-11 00:04:35,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1985 states to 1985 states and 6729 transitions. [2021-03-11 00:04:35,472 INFO L78 Accepts]: Start accepts. Automaton has 1985 states and 6729 transitions. Word has length 26 [2021-03-11 00:04:35,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:04:35,472 INFO L480 AbstractCegarLoop]: Abstraction has 1985 states and 6729 transitions. [2021-03-11 00:04:35,472 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) [2021-03-11 00:04:35,472 INFO L276 IsEmpty]: Start isEmpty. Operand 1985 states and 6729 transitions. [2021-03-11 00:04:35,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:04:35,475 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:04:35,475 INFO L519 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] [2021-03-11 00:04:35,676 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2824,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:04:35,676 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:04:35,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:04:35,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1833133118, now seen corresponding path program 59 times [2021-03-11 00:04:35,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:04:35,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608869838] [2021-03-11 00:04:35,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:04:35,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:04:35,974 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-03-11 00:04:36,138 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 17 [2021-03-11 00:04:36,353 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-03-11 00:04:36,578 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2021-03-11 00:04:37,152 WARN L205 SmtUtils]: Spent 530.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2021-03-11 00:04:37,501 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 29 [2021-03-11 00:04:37,683 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2021-03-11 00:04:37,851 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 14 [2021-03-11 00:04:37,854 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:04:37,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608869838] [2021-03-11 00:04:37,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924170228] [2021-03-11 00:04:37,855 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 [2021-03-11 00:04:37,874 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:04:37,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:04:37,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:04:37,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:04:38,590 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-11 00:04:38,901 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-11 00:04:39,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:39,128 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 [2021-03-11 00:04:39,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:39,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:39,154 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 [2021-03-11 00:04:39,159 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:39,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:39,180 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 [2021-03-11 00:04:39,185 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:39,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:39,205 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 38 treesize of output 16 [2021-03-11 00:04:39,211 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:39,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:39,232 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 [2021-03-11 00:04:39,237 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:39,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:39,258 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 [2021-03-11 00:04:39,264 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:39,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:39,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-03-11 00:04:39,291 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:39,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:39,312 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 [2021-03-11 00:04:39,317 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:39,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:39,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-03-11 00:04:39,343 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:39,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:39,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-03-11 00:04:39,369 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:39,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:39,390 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 [2021-03-11 00:04:39,395 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:39,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:39,416 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 [2021-03-11 00:04:39,422 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:39,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:39,443 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 [2021-03-11 00:04:39,448 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:39,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:39,468 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 [2021-03-11 00:04:39,474 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:39,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:39,494 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 [2021-03-11 00:04:39,499 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:39,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:39,510 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 13 treesize of output 7 [2021-03-11 00:04:39,518 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:39,711 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 16 [2021-03-11 00:04:39,713 INFO L628 ElimStorePlain]: treesize reduction 34, result has 49.3 percent of original size [2021-03-11 00:04:39,718 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-11 00:04:39,718 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-03-11 00:04:39,943 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:04:39,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:04:39,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-03-11 00:04:39,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728575084] [2021-03-11 00:04:39,943 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:04:39,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:04:39,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:04:39,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:04:39,944 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) [2021-03-11 00:04:41,119 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-03-11 00:04:41,412 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 29 [2021-03-11 00:04:42,136 WARN L205 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 37 [2021-03-11 00:04:43,241 WARN L205 SmtUtils]: Spent 851.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-03-11 00:04:43,861 WARN L205 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-03-11 00:04:44,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:04:44,289 INFO L93 Difference]: Finished difference Result 2096 states and 7003 transitions. [2021-03-11 00:04:44,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-11 00:04:44,294 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 [2021-03-11 00:04:44,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:04:44,298 INFO L225 Difference]: With dead ends: 2096 [2021-03-11 00:04:44,298 INFO L226 Difference]: Without dead ends: 2081 [2021-03-11 00:04:44,298 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 6156.6ms TimeCoverageRelationStatistics Valid=160, Invalid=596, Unknown=0, NotChecked=0, Total=756 [2021-03-11 00:04:44,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2081 states. [2021-03-11 00:04:44,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2081 to 1995. [2021-03-11 00:04:44,320 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) [2021-03-11 00:04:44,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1995 states to 1995 states and 6766 transitions. [2021-03-11 00:04:44,324 INFO L78 Accepts]: Start accepts. Automaton has 1995 states and 6766 transitions. Word has length 26 [2021-03-11 00:04:44,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:04:44,324 INFO L480 AbstractCegarLoop]: Abstraction has 1995 states and 6766 transitions. [2021-03-11 00:04:44,324 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) [2021-03-11 00:04:44,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1995 states and 6766 transitions. [2021-03-11 00:04:44,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:04:44,327 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:04:44,327 INFO L519 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] [2021-03-11 00:04:44,528 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2838,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:04:44,528 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:04:44,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:04:44,529 INFO L82 PathProgramCache]: Analyzing trace with hash 179857598, now seen corresponding path program 43 times [2021-03-11 00:04:44,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:04:44,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122043800] [2021-03-11 00:04:44,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:04:44,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:04:45,035 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2021-03-11 00:04:45,498 WARN L205 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-03-11 00:04:45,903 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-03-11 00:04:46,299 WARN L205 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-03-11 00:04:46,617 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-03-11 00:04:46,770 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 12 [2021-03-11 00:04:46,774 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:04:46,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122043800] [2021-03-11 00:04:46,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986669795] [2021-03-11 00:04:46,774 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 [2021-03-11 00:04:46,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:04:46,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:04:46,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:04:47,328 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-11 00:04:47,661 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-03-11 00:04:47,922 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-11 00:04:49,214 WARN L205 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-03-11 00:04:49,450 INFO L446 ElimStorePlain]: Different costs {2=[A, v_prenex_318], 3=[v_prenex_316, v_prenex_320]} [2021-03-11 00:04:49,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:49,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:49,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:49,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-11 00:04:49,483 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:49,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:49,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:49,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-11 00:04:49,508 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:50,338 WARN L205 SmtUtils]: Spent 829.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-03-11 00:04:50,340 INFO L628 ElimStorePlain]: treesize reduction 119, result has 50.4 percent of original size [2021-03-11 00:04:50,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:50,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:04:50,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:04:50,362 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:50,634 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-11 00:04:50,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:04:50,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:50,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:04:50,658 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:50,914 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-11 00:04:50,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:04:50,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:04:50,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-03-11 00:04:50,934 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:04:51,172 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-11 00:04:51,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:04:51,181 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:04:51,181 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 7 variables, input treesize:281, output treesize:56 [2021-03-11 00:04:51,427 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2021-03-11 00:04:51,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:04:51,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:04:51,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:04:51,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442359218] [2021-03-11 00:04:51,524 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:04:51,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:04:51,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:04:51,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:04:51,524 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) [2021-03-11 00:04:51,881 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 24 [2021-03-11 00:04:52,102 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-11 00:04:52,588 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-11 00:04:53,244 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 31 [2021-03-11 00:04:53,819 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-03-11 00:04:54,673 WARN L205 SmtUtils]: Spent 636.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2021-03-11 00:04:55,238 WARN L205 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2021-03-11 00:04:55,953 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-11 00:04:57,048 WARN L205 SmtUtils]: Spent 965.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2021-03-11 00:04:57,895 WARN L205 SmtUtils]: Spent 556.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-03-11 00:04:58,460 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-03-11 00:04:58,828 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-11 00:04:58,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:04:58,984 INFO L93 Difference]: Finished difference Result 2554 states and 8430 transitions. [2021-03-11 00:04:58,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-11 00:04:58,989 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 [2021-03-11 00:04:58,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:04:58,993 INFO L225 Difference]: With dead ends: 2554 [2021-03-11 00:04:58,993 INFO L226 Difference]: Without dead ends: 2539 [2021-03-11 00:04:58,994 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 9731.3ms TimeCoverageRelationStatistics Valid=207, Invalid=723, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:04:58,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2539 states. [2021-03-11 00:04:59,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2539 to 2003. [2021-03-11 00:04:59,019 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) [2021-03-11 00:04:59,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2003 states to 2003 states and 6790 transitions. [2021-03-11 00:04:59,024 INFO L78 Accepts]: Start accepts. Automaton has 2003 states and 6790 transitions. Word has length 26 [2021-03-11 00:04:59,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:04:59,024 INFO L480 AbstractCegarLoop]: Abstraction has 2003 states and 6790 transitions. [2021-03-11 00:04:59,024 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) [2021-03-11 00:04:59,024 INFO L276 IsEmpty]: Start isEmpty. Operand 2003 states and 6790 transitions. [2021-03-11 00:04:59,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:04:59,027 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:04:59,027 INFO L519 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] [2021-03-11 00:04:59,228 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2852,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:04:59,228 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:04:59,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:04:59,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1730239162, now seen corresponding path program 60 times [2021-03-11 00:04:59,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:04:59,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126658917] [2021-03-11 00:04:59,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:04:59,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:04:59,486 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2021-03-11 00:04:59,748 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-03-11 00:04:59,961 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2021-03-11 00:05:00,326 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-03-11 00:05:00,675 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-03-11 00:05:00,992 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-03-11 00:05:01,189 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2021-03-11 00:05:01,193 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:05:01,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126658917] [2021-03-11 00:05:01,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465306214] [2021-03-11 00:05:01,194 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 [2021-03-11 00:05:01,213 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:05:01,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:05:01,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:05:01,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:05:01,850 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-11 00:05:02,220 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-11 00:05:02,733 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-11 00:05:04,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:04,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:04,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:04,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:04,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:04,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-03-11 00:05:04,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:04,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:04,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:04,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:04,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:04,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:04,590 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 [2021-03-11 00:05:04,596 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:04,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:04,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:04,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:04,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:04,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:04,635 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 [2021-03-11 00:05:04,643 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:04,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:04,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:04,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:04,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:04,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:04,688 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 [2021-03-11 00:05:04,693 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:04,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:04,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:04,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:04,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:04,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:04,739 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 [2021-03-11 00:05:04,745 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:04,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:04,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:04,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:04,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:04,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:04,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-03-11 00:05:04,798 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:04,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:04,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:04,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:04,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:04,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:04,838 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 [2021-03-11 00:05:04,843 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:04,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:04,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:04,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:04,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:04,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:04,894 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 [2021-03-11 00:05:04,900 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:04,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:04,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:04,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:04,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:04,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:04,953 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 [2021-03-11 00:05:04,959 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:04,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:04,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:04,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:04,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:05,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:05,016 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 [2021-03-11 00:05:05,022 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:05,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:05,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:05,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:05,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:05,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:05,061 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 [2021-03-11 00:05:05,067 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:05,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:05,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:05,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:05,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:05,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:05,105 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 [2021-03-11 00:05:05,110 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:05,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:05,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:05,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:05,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:05,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:05,171 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 [2021-03-11 00:05:05,177 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:05,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:05,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:05,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:05,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:05,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:05,203 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 [2021-03-11 00:05:05,209 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:05,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:05,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:05,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:05,224 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 [2021-03-11 00:05:05,229 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:05,410 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 16 [2021-03-11 00:05:05,411 INFO L628 ElimStorePlain]: treesize reduction 16, result has 62.8 percent of original size [2021-03-11 00:05:05,416 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-11 00:05:05,417 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-03-11 00:05:05,530 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:05:05,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:05:05,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-03-11 00:05:05,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191448809] [2021-03-11 00:05:05,530 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:05:05,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:05:05,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:05:05,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:05:05,531 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) [2021-03-11 00:05:05,839 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-03-11 00:05:06,666 WARN L205 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-03-11 00:05:06,963 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-03-11 00:05:07,454 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2021-03-11 00:05:08,005 WARN L205 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2021-03-11 00:05:08,428 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-11 00:05:09,208 WARN L205 SmtUtils]: Spent 675.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2021-03-11 00:05:10,180 WARN L205 SmtUtils]: Spent 477.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-03-11 00:05:11,067 WARN L205 SmtUtils]: Spent 740.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-03-11 00:05:11,563 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-11 00:05:12,673 WARN L205 SmtUtils]: Spent 896.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-03-11 00:05:13,405 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-03-11 00:05:13,825 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2021-03-11 00:05:14,046 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-11 00:05:14,474 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-11 00:05:14,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:05:14,674 INFO L93 Difference]: Finished difference Result 2567 states and 8303 transitions. [2021-03-11 00:05:14,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-11 00:05:14,679 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 [2021-03-11 00:05:14,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:05:14,684 INFO L225 Difference]: With dead ends: 2567 [2021-03-11 00:05:14,684 INFO L226 Difference]: Without dead ends: 2545 [2021-03-11 00:05:14,684 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 10027.2ms TimeCoverageRelationStatistics Valid=225, Invalid=897, Unknown=0, NotChecked=0, Total=1122 [2021-03-11 00:05:14,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2545 states. [2021-03-11 00:05:14,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2545 to 2012. [2021-03-11 00:05:14,712 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) [2021-03-11 00:05:14,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2012 states to 2012 states and 6837 transitions. [2021-03-11 00:05:14,717 INFO L78 Accepts]: Start accepts. Automaton has 2012 states and 6837 transitions. Word has length 26 [2021-03-11 00:05:14,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:05:14,717 INFO L480 AbstractCegarLoop]: Abstraction has 2012 states and 6837 transitions. [2021-03-11 00:05:14,717 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) [2021-03-11 00:05:14,717 INFO L276 IsEmpty]: Start isEmpty. Operand 2012 states and 6837 transitions. [2021-03-11 00:05:14,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:05:14,720 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:05:14,720 INFO L519 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] [2021-03-11 00:05:14,921 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2863 [2021-03-11 00:05:14,922 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:05:14,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:05:14,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1769727974, now seen corresponding path program 44 times [2021-03-11 00:05:14,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:05:14,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836775975] [2021-03-11 00:05:14,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:05:14,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:05:15,172 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2021-03-11 00:05:15,521 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2021-03-11 00:05:16,185 WARN L205 SmtUtils]: Spent 633.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2021-03-11 00:05:16,419 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-11 00:05:16,629 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-11 00:05:16,822 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-03-11 00:05:16,965 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 12 [2021-03-11 00:05:16,970 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:05:16,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836775975] [2021-03-11 00:05:16,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335691097] [2021-03-11 00:05:16,970 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 [2021-03-11 00:05:17,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:05:17,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:05:17,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-11 00:05:17,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:05:17,549 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-11 00:05:17,920 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-03-11 00:05:18,786 WARN L205 SmtUtils]: Spent 676.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-11 00:05:19,928 WARN L205 SmtUtils]: Spent 759.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 55 [2021-03-11 00:05:20,294 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_328], 2=[A, v_prenex_329]} [2021-03-11 00:05:20,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:20,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-11 00:05:20,321 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:21,141 WARN L205 SmtUtils]: Spent 820.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-03-11 00:05:21,143 INFO L628 ElimStorePlain]: treesize reduction 54, result has 69.8 percent of original size [2021-03-11 00:05:21,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:21,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:21,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:21,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:05:21,186 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:21,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:21,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:21,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-11 00:05:21,211 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:21,507 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-11 00:05:21,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:05:21,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:21,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:21,525 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 16 [2021-03-11 00:05:21,532 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:21,786 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-11 00:05:21,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:05:21,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:05:21,798 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:193, output treesize:51 [2021-03-11 00:05:22,079 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2021-03-11 00:05:22,192 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:05:22,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:05:22,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:05:22,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960222030] [2021-03-11 00:05:22,192 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:05:22,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:05:22,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:05:22,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:05:22,192 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) [2021-03-11 00:05:22,533 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 25 [2021-03-11 00:05:22,857 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-11 00:05:23,400 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-11 00:05:24,036 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 32 [2021-03-11 00:05:24,639 WARN L205 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-03-11 00:05:26,250 WARN L205 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2021-03-11 00:05:26,826 WARN L205 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2021-03-11 00:05:28,024 WARN L205 SmtUtils]: Spent 917.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2021-03-11 00:05:28,686 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-11 00:05:29,503 WARN L205 SmtUtils]: Spent 684.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2021-03-11 00:05:31,332 WARN L205 SmtUtils]: Spent 1.63 s on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-03-11 00:05:32,688 WARN L205 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 80 DAG size of output: 68 [2021-03-11 00:05:35,148 WARN L205 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 94 DAG size of output: 75 [2021-03-11 00:05:36,697 WARN L205 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 92 DAG size of output: 74 [2021-03-11 00:05:37,437 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-11 00:05:37,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:05:37,870 INFO L93 Difference]: Finished difference Result 2646 states and 8732 transitions. [2021-03-11 00:05:37,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-11 00:05:37,875 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 [2021-03-11 00:05:37,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:05:37,880 INFO L225 Difference]: With dead ends: 2646 [2021-03-11 00:05:37,880 INFO L226 Difference]: Without dead ends: 2631 [2021-03-11 00:05:37,880 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 17317.0ms TimeCoverageRelationStatistics Valid=237, Invalid=885, Unknown=0, NotChecked=0, Total=1122 [2021-03-11 00:05:37,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2631 states. [2021-03-11 00:05:37,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2631 to 2017. [2021-03-11 00:05:37,908 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) [2021-03-11 00:05:37,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2017 states to 2017 states and 6856 transitions. [2021-03-11 00:05:37,913 INFO L78 Accepts]: Start accepts. Automaton has 2017 states and 6856 transitions. Word has length 26 [2021-03-11 00:05:37,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:05:37,913 INFO L480 AbstractCegarLoop]: Abstraction has 2017 states and 6856 transitions. [2021-03-11 00:05:37,913 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) [2021-03-11 00:05:37,913 INFO L276 IsEmpty]: Start isEmpty. Operand 2017 states and 6856 transitions. [2021-03-11 00:05:37,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:05:37,916 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:05:37,916 INFO L519 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] [2021-03-11 00:05:38,116 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2977 [2021-03-11 00:05:38,117 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:05:38,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:05:38,117 INFO L82 PathProgramCache]: Analyzing trace with hash 152195194, now seen corresponding path program 45 times [2021-03-11 00:05:38,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:05:38,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506236784] [2021-03-11 00:05:38,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:05:38,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:05:38,651 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-03-11 00:05:39,175 WARN L205 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-03-11 00:05:39,855 WARN L205 SmtUtils]: Spent 624.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-03-11 00:05:40,446 WARN L205 SmtUtils]: Spent 556.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-03-11 00:05:40,618 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 16 [2021-03-11 00:05:40,786 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 12 [2021-03-11 00:05:40,791 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:05:40,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506236784] [2021-03-11 00:05:40,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447111805] [2021-03-11 00:05:40,791 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 [2021-03-11 00:05:40,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:05:40,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:05:40,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:05:40,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:05:41,386 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-11 00:05:42,395 WARN L205 SmtUtils]: Spent 753.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-03-11 00:05:43,440 WARN L205 SmtUtils]: Spent 671.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-03-11 00:05:43,986 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]} [2021-03-11 00:05:44,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:44,116 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:05:44,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:05:44,120 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:46,038 WARN L205 SmtUtils]: Spent 1.92 s on a formula simplification. DAG size of input: 172 DAG size of output: 156 [2021-03-11 00:05:46,040 INFO L628 ElimStorePlain]: treesize reduction 226, result has 61.6 percent of original size [2021-03-11 00:05:46,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:46,140 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:05:46,140 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-03-11 00:05:46,159 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:47,811 WARN L205 SmtUtils]: Spent 1.65 s on a formula simplification. DAG size of input: 155 DAG size of output: 152 [2021-03-11 00:05:47,812 INFO L628 ElimStorePlain]: treesize reduction 8, result has 97.7 percent of original size [2021-03-11 00:05:47,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:47,949 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2021-03-11 00:05:47,951 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:05:47,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:05:47,959 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:48,780 WARN L205 SmtUtils]: Spent 820.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2021-03-11 00:05:48,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:05:48,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:48,907 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:05:48,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:05:48,929 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:49,747 WARN L205 SmtUtils]: Spent 817.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2021-03-11 00:05:49,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:05:49,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:49,869 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:05:49,869 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-03-11 00:05:49,879 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:50,720 WARN L205 SmtUtils]: Spent 840.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2021-03-11 00:05:50,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:05:50,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:50,845 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:05:50,845 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 [2021-03-11 00:05:50,854 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:51,705 WARN L205 SmtUtils]: Spent 850.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2021-03-11 00:05:51,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:05:51,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:51,802 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:05:51,802 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 32 [2021-03-11 00:05:51,840 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:53,374 WARN L205 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 128 DAG size of output: 123 [2021-03-11 00:05:53,376 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.9 percent of original size [2021-03-11 00:05:53,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:05:53,461 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:05:53,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:05:53,519 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:54,239 WARN L205 SmtUtils]: Spent 719.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-03-11 00:05:54,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:05:54,309 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:05:54,309 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 24 variables, input treesize:599, output treesize:323 [2021-03-11 00:05:55,721 WARN L205 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2021-03-11 00:05:56,211 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 22 [2021-03-11 00:05:56,342 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:05:56,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:05:56,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:05:56,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883405568] [2021-03-11 00:05:56,343 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:05:56,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:05:56,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:05:56,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:05:56,343 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) [2021-03-11 00:05:56,702 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 25 [2021-03-11 00:05:57,093 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 20 [2021-03-11 00:05:57,389 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-11 00:05:58,205 WARN L205 SmtUtils]: Spent 529.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-03-11 00:05:59,160 WARN L205 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 26 [2021-03-11 00:05:59,682 WARN L205 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 32 [2021-03-11 00:06:01,233 WARN L205 SmtUtils]: Spent 796.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2021-03-11 00:06:01,790 WARN L205 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 37 [2021-03-11 00:06:02,620 WARN L205 SmtUtils]: Spent 662.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 40 [2021-03-11 00:06:05,289 WARN L205 SmtUtils]: Spent 2.33 s on a formula simplification. DAG size of input: 95 DAG size of output: 89 [2021-03-11 00:06:06,521 WARN L205 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-03-11 00:06:07,122 WARN L205 SmtUtils]: Spent 468.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-03-11 00:06:08,239 WARN L205 SmtUtils]: Spent 644.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-03-11 00:06:08,681 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-11 00:06:12,571 WARN L205 SmtUtils]: Spent 3.60 s on a formula simplification. DAG size of input: 79 DAG size of output: 57 [2021-03-11 00:06:14,842 WARN L205 SmtUtils]: Spent 1.96 s on a formula simplification. DAG size of input: 126 DAG size of output: 111 [2021-03-11 00:06:17,965 WARN L205 SmtUtils]: Spent 2.99 s on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2021-03-11 00:06:20,877 WARN L205 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 135 DAG size of output: 115 [2021-03-11 00:06:26,872 WARN L205 SmtUtils]: Spent 5.75 s on a formula simplification. DAG size of input: 97 DAG size of output: 78 [2021-03-11 00:06:28,712 WARN L205 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 60 DAG size of output: 33 [2021-03-11 00:06:29,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:06:29,065 INFO L93 Difference]: Finished difference Result 2860 states and 9360 transitions. [2021-03-11 00:06:29,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-11 00:06:29,072 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 [2021-03-11 00:06:29,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:06:29,077 INFO L225 Difference]: With dead ends: 2860 [2021-03-11 00:06:29,077 INFO L226 Difference]: Without dead ends: 2845 [2021-03-11 00:06:29,077 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 35358.3ms TimeCoverageRelationStatistics Valid=353, Invalid=1129, Unknown=0, NotChecked=0, Total=1482 [2021-03-11 00:06:29,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2845 states. [2021-03-11 00:06:29,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2845 to 2025. [2021-03-11 00:06:29,110 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) [2021-03-11 00:06:29,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2025 states to 2025 states and 6881 transitions. [2021-03-11 00:06:29,116 INFO L78 Accepts]: Start accepts. Automaton has 2025 states and 6881 transitions. Word has length 26 [2021-03-11 00:06:29,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:06:29,116 INFO L480 AbstractCegarLoop]: Abstraction has 2025 states and 6881 transitions. [2021-03-11 00:06:29,116 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) [2021-03-11 00:06:29,116 INFO L276 IsEmpty]: Start isEmpty. Operand 2025 states and 6881 transitions. [2021-03-11 00:06:29,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:06:29,119 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:06:29,119 INFO L519 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] [2021-03-11 00:06:29,332 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2986 [2021-03-11 00:06:29,332 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:06:29,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:06:29,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1956232686, now seen corresponding path program 61 times [2021-03-11 00:06:29,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:06:29,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428723328] [2021-03-11 00:06:29,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:06:29,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:06:29,622 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2021-03-11 00:06:29,916 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-03-11 00:06:30,164 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2021-03-11 00:06:30,551 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-03-11 00:06:30,957 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-03-11 00:06:31,332 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-03-11 00:06:31,573 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2021-03-11 00:06:31,578 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:31,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428723328] [2021-03-11 00:06:31,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096615385] [2021-03-11 00:06:31,579 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 [2021-03-11 00:06:31,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:06:31,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:06:31,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:06:32,005 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-03-11 00:06:32,253 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-11 00:06:33,345 WARN L205 SmtUtils]: Spent 817.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-03-11 00:06:34,509 WARN L205 SmtUtils]: Spent 821.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-03-11 00:06:35,741 WARN L205 SmtUtils]: Spent 766.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 58 [2021-03-11 00:06:36,369 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_360], 6=[v_prenex_362, v_prenex_358]} [2021-03-11 00:06:36,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:36,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:36,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:36,406 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-03-11 00:06:36,415 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:36,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:36,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:36,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-11 00:06:36,443 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:37,270 WARN L205 SmtUtils]: Spent 826.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 64 [2021-03-11 00:06:37,271 INFO L628 ElimStorePlain]: treesize reduction 157, result has 47.0 percent of original size [2021-03-11 00:06:37,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:37,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-03-11 00:06:37,290 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:37,601 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-03-11 00:06:37,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:06:37,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:37,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:37,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:06:37,633 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:37,949 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-03-11 00:06:37,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:06:37,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:37,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:37,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:06:37,978 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:38,242 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-11 00:06:38,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:06:38,256 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-11 00:06:38,256 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 12 variables, input treesize:357, output treesize:33 [2021-03-11 00:06:38,410 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:38,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:06:38,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-11 00:06:38,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026751069] [2021-03-11 00:06:38,411 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:06:38,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:06:38,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:06:38,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:06:38,411 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) [2021-03-11 00:06:38,849 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 22 [2021-03-11 00:06:39,175 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-03-11 00:06:39,605 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-11 00:06:39,967 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-03-11 00:06:40,740 WARN L205 SmtUtils]: Spent 575.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2021-03-11 00:06:41,240 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-11 00:06:41,823 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-03-11 00:06:42,429 WARN L205 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-03-11 00:06:43,878 WARN L205 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 111 DAG size of output: 33 [2021-03-11 00:06:44,380 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-11 00:06:45,461 WARN L205 SmtUtils]: Spent 779.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-03-11 00:06:46,172 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-11 00:06:46,348 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-03-11 00:06:48,512 WARN L205 SmtUtils]: Spent 1.68 s on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2021-03-11 00:06:49,845 WARN L205 SmtUtils]: Spent 843.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-03-11 00:06:52,175 WARN L205 SmtUtils]: Spent 1.71 s on a formula simplification. DAG size of input: 121 DAG size of output: 76 [2021-03-11 00:06:52,995 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2021-03-11 00:06:53,781 WARN L205 SmtUtils]: Spent 524.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 26 [2021-03-11 00:06:54,112 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-11 00:06:54,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:06:54,421 INFO L93 Difference]: Finished difference Result 2877 states and 9256 transitions. [2021-03-11 00:06:54,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:06:54,427 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 [2021-03-11 00:06:54,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:06:54,432 INFO L225 Difference]: With dead ends: 2877 [2021-03-11 00:06:54,433 INFO L226 Difference]: Without dead ends: 2847 [2021-03-11 00:06:54,433 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 17810.2ms TimeCoverageRelationStatistics Valid=283, Invalid=1123, Unknown=0, NotChecked=0, Total=1406 [2021-03-11 00:06:54,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2847 states. [2021-03-11 00:06:54,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2847 to 2076. [2021-03-11 00:06:54,465 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) [2021-03-11 00:06:54,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2076 states to 2076 states and 7062 transitions. [2021-03-11 00:06:54,470 INFO L78 Accepts]: Start accepts. Automaton has 2076 states and 7062 transitions. Word has length 26 [2021-03-11 00:06:54,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:06:54,470 INFO L480 AbstractCegarLoop]: Abstraction has 2076 states and 7062 transitions. [2021-03-11 00:06:54,470 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) [2021-03-11 00:06:54,470 INFO L276 IsEmpty]: Start isEmpty. Operand 2076 states and 7062 transitions. [2021-03-11 00:06:54,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:06:54,473 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:06:54,473 INFO L519 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] [2021-03-11 00:06:54,673 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3027,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:06:54,674 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:06:54,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:06:54,674 INFO L82 PathProgramCache]: Analyzing trace with hash -505085958, now seen corresponding path program 62 times [2021-03-11 00:06:54,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:06:54,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991587662] [2021-03-11 00:06:54,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:06:54,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:06:54,971 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2021-03-11 00:06:55,277 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-03-11 00:06:55,530 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2021-03-11 00:06:55,912 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-03-11 00:06:56,307 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-03-11 00:06:56,528 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 17 [2021-03-11 00:06:56,759 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2021-03-11 00:06:56,765 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:56,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991587662] [2021-03-11 00:06:56,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690624724] [2021-03-11 00:06:56,765 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 [2021-03-11 00:06:56,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:06:56,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:06:56,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:06:56,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:06:57,241 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-03-11 00:06:57,487 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-11 00:06:57,890 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-11 00:06:58,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:58,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:58,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:58,311 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:06:58,312 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 39 treesize of output 49 [2021-03-11 00:06:58,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:58,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:58,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:58,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:58,480 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-03-11 00:06:58,480 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 [2021-03-11 00:06:58,487 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:58,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:58,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:58,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:58,697 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 10 [2021-03-11 00:06:58,699 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-03-11 00:06:58,699 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 [2021-03-11 00:06:58,710 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:58,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:58,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:58,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:58,835 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-03-11 00:06:58,835 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 [2021-03-11 00:06:58,841 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:58,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:58,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:58,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:59,037 INFO L354 Elim1Store]: treesize reduction 20, result has 35.5 percent of original size [2021-03-11 00:06:59,037 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 32 treesize of output 26 [2021-03-11 00:06:59,048 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:59,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:59,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:59,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:59,250 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-03-11 00:06:59,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 26 [2021-03-11 00:06:59,257 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:59,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:59,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:59,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:59,486 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2021-03-11 00:06:59,487 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:06:59,488 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 [2021-03-11 00:06:59,542 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:59,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:59,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:59,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:59,657 INFO L244 Elim1Store]: Index analysis took 101 ms [2021-03-11 00:06:59,763 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 11 [2021-03-11 00:06:59,765 INFO L354 Elim1Store]: treesize reduction 19, result has 38.7 percent of original size [2021-03-11 00:06:59,765 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 [2021-03-11 00:06:59,773 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:59,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:59,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:59,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:59,904 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-03-11 00:06:59,904 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 [2021-03-11 00:06:59,910 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:59,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:59,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:59,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:00,033 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-03-11 00:07:00,033 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 [2021-03-11 00:07:00,040 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:00,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:00,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:00,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:00,163 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-03-11 00:07:00,163 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 39 treesize of output 1 [2021-03-11 00:07:00,169 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:00,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:00,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:00,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:00,291 INFO L244 Elim1Store]: Index analysis took 105 ms [2021-03-11 00:07:00,314 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-03-11 00:07:00,315 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 [2021-03-11 00:07:00,321 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:00,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:00,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:00,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:00,514 INFO L354 Elim1Store]: treesize reduction 19, result has 38.7 percent of original size [2021-03-11 00:07:00,514 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 [2021-03-11 00:07:00,525 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:00,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:00,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:00,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:00,740 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 10 [2021-03-11 00:07:00,742 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-03-11 00:07:00,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-03-11 00:07:00,755 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:00,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:00,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:00,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:00,871 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-03-11 00:07:00,871 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 [2021-03-11 00:07:00,878 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:00,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:00,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:00,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:01,034 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-03-11 00:07:01,035 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 [2021-03-11 00:07:01,045 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:01,825 WARN L205 SmtUtils]: Spent 779.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 22 [2021-03-11 00:07:01,827 INFO L628 ElimStorePlain]: treesize reduction 134, result has 37.7 percent of original size [2021-03-11 00:07:01,831 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-11 00:07:01,831 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:753, output treesize:81 [2021-03-11 00:07:02,231 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2021-03-11 00:07:02,491 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:07:02,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:07:02,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-03-11 00:07:02,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622333071] [2021-03-11 00:07:02,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:07:02,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:07:02,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:07:02,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:07:02,492 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) [2021-03-11 00:07:02,979 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 24 [2021-03-11 00:07:03,282 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-03-11 00:07:03,923 WARN L205 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2021-03-11 00:07:04,287 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-03-11 00:07:04,535 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-11 00:07:05,107 WARN L205 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2021-03-11 00:07:05,498 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2021-03-11 00:07:06,893 WARN L205 SmtUtils]: Spent 884.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 40 [2021-03-11 00:07:07,472 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-11 00:07:07,909 WARN L205 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2021-03-11 00:07:08,688 WARN L205 SmtUtils]: Spent 664.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2021-03-11 00:07:09,046 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2021-03-11 00:07:09,846 WARN L205 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-03-11 00:07:10,815 WARN L205 SmtUtils]: Spent 800.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2021-03-11 00:07:11,726 WARN L205 SmtUtils]: Spent 804.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2021-03-11 00:07:12,149 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-11 00:07:12,350 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-03-11 00:07:13,791 WARN L205 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2021-03-11 00:07:14,728 WARN L205 SmtUtils]: Spent 834.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2021-03-11 00:07:15,735 WARN L205 SmtUtils]: Spent 908.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2021-03-11 00:07:16,757 WARN L205 SmtUtils]: Spent 720.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2021-03-11 00:07:18,486 WARN L205 SmtUtils]: Spent 1.51 s on a formula simplification. DAG size of input: 81 DAG size of output: 71 [2021-03-11 00:07:20,211 WARN L205 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2021-03-11 00:07:21,246 WARN L205 SmtUtils]: Spent 727.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-03-11 00:07:23,088 WARN L205 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2021-03-11 00:07:23,516 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 18 [2021-03-11 00:07:24,503 WARN L205 SmtUtils]: Spent 672.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 27 [2021-03-11 00:07:25,913 WARN L205 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-03-11 00:07:27,014 WARN L205 SmtUtils]: Spent 856.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2021-03-11 00:07:27,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:07:27,336 INFO L93 Difference]: Finished difference Result 3116 states and 9915 transitions. [2021-03-11 00:07:27,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-11 00:07:27,342 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 [2021-03-11 00:07:27,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:07:27,348 INFO L225 Difference]: With dead ends: 3116 [2021-03-11 00:07:27,348 INFO L226 Difference]: Without dead ends: 3072 [2021-03-11 00:07:27,348 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 24221.2ms TimeCoverageRelationStatistics Valid=488, Invalid=1768, Unknown=0, NotChecked=0, Total=2256 [2021-03-11 00:07:27,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3072 states. [2021-03-11 00:07:27,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3072 to 2087. [2021-03-11 00:07:27,385 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) [2021-03-11 00:07:27,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2087 states to 2087 states and 7092 transitions. [2021-03-11 00:07:27,390 INFO L78 Accepts]: Start accepts. Automaton has 2087 states and 7092 transitions. Word has length 26 [2021-03-11 00:07:27,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:07:27,390 INFO L480 AbstractCegarLoop]: Abstraction has 2087 states and 7092 transitions. [2021-03-11 00:07:27,390 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) [2021-03-11 00:07:27,390 INFO L276 IsEmpty]: Start isEmpty. Operand 2087 states and 7092 transitions. [2021-03-11 00:07:27,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:07:27,393 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:07:27,393 INFO L519 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] [2021-03-11 00:07:27,593 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3046,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:07:27,594 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:07:27,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:07:27,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1345416738, now seen corresponding path program 46 times [2021-03-11 00:07:27,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:07:27,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492095759] [2021-03-11 00:07:27,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:07:27,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:07:27,749 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 17 [2021-03-11 00:07:27,888 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2021-03-11 00:07:28,226 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2021-03-11 00:07:28,882 WARN L205 SmtUtils]: Spent 628.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2021-03-11 00:07:29,437 WARN L205 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-03-11 00:07:29,953 WARN L205 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-03-11 00:07:30,475 WARN L205 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-03-11 00:07:30,687 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 12 [2021-03-11 00:07:30,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:07:30,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492095759] [2021-03-11 00:07:30,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812704938] [2021-03-11 00:07:30,693 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 [2021-03-11 00:07:30,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:07:30,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:07:30,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:07:30,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:07:31,181 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-03-11 00:07:31,482 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-11 00:07:32,149 WARN L205 SmtUtils]: Spent 423.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-11 00:07:33,292 WARN L205 SmtUtils]: Spent 872.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-03-11 00:07:35,053 WARN L205 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 90 DAG size of output: 54 [2021-03-11 00:07:35,493 INFO L446 ElimStorePlain]: Different costs {1=[A], 2=[v_prenex_371, v_prenex_372]} [2021-03-11 00:07:35,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:35,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-11 00:07:35,521 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:36,443 WARN L205 SmtUtils]: Spent 921.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-03-11 00:07:36,445 INFO L628 ElimStorePlain]: treesize reduction 54, result has 69.8 percent of original size [2021-03-11 00:07:36,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:36,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:36,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:07:36,473 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:36,876 WARN L205 SmtUtils]: Spent 402.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-11 00:07:36,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:07:36,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:36,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:36,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:36,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:07:36,924 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:36,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:36,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:36,944 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 [2021-03-11 00:07:36,951 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:37,279 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-03-11 00:07:37,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:07:37,291 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:07:37,291 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:193, output treesize:51 [2021-03-11 00:07:37,634 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2021-03-11 00:07:37,761 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:07:37,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:07:37,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:07:37,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957743194] [2021-03-11 00:07:37,762 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:07:37,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:07:37,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:07:37,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:07:37,762 INFO L87 Difference]: Start difference. First operand 2087 states and 7092 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) [2021-03-11 00:07:38,121 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 25 [2021-03-11 00:07:38,473 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 26 [2021-03-11 00:07:38,801 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-11 00:07:39,513 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-11 00:07:40,311 WARN L205 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 32 [2021-03-11 00:07:40,955 WARN L205 SmtUtils]: Spent 541.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 33 [2021-03-11 00:07:41,667 WARN L205 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-03-11 00:07:42,469 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-11 00:07:43,210 WARN L205 SmtUtils]: Spent 616.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 41 [2021-03-11 00:07:43,986 WARN L205 SmtUtils]: Spent 669.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-03-11 00:07:45,510 WARN L205 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2021-03-11 00:07:45,854 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-11 00:07:47,268 WARN L205 SmtUtils]: Spent 751.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-03-11 00:07:48,350 WARN L205 SmtUtils]: Spent 890.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-03-11 00:07:50,068 WARN L205 SmtUtils]: Spent 1.40 s on a formula simplification. DAG size of input: 95 DAG size of output: 79 [2021-03-11 00:07:50,675 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-03-11 00:07:51,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:07:51,012 INFO L93 Difference]: Finished difference Result 2600 states and 8678 transitions. [2021-03-11 00:07:51,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-11 00:07:51,018 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 [2021-03-11 00:07:51,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:07:51,023 INFO L225 Difference]: With dead ends: 2600 [2021-03-11 00:07:51,023 INFO L226 Difference]: Without dead ends: 2585 [2021-03-11 00:07:51,023 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 17161.1ms TimeCoverageRelationStatistics Valid=229, Invalid=961, Unknown=0, NotChecked=0, Total=1190 [2021-03-11 00:07:51,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2585 states. [2021-03-11 00:07:51,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2585 to 2084. [2021-03-11 00:07:51,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2084 states, 2083 states have (on average 3.398943831012962) internal successors, (7080), 2083 states have internal predecessors, (7080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:07:51,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2084 states to 2084 states and 7080 transitions. [2021-03-11 00:07:51,059 INFO L78 Accepts]: Start accepts. Automaton has 2084 states and 7080 transitions. Word has length 26 [2021-03-11 00:07:51,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:07:51,059 INFO L480 AbstractCegarLoop]: Abstraction has 2084 states and 7080 transitions. [2021-03-11 00:07:51,059 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) [2021-03-11 00:07:51,059 INFO L276 IsEmpty]: Start isEmpty. Operand 2084 states and 7080 transitions. [2021-03-11 00:07:51,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:07:51,062 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:07:51,063 INFO L519 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] [2021-03-11 00:07:51,273 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3076,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:07:51,273 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:07:51,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:07:51,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1962058946, now seen corresponding path program 47 times [2021-03-11 00:07:51,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:07:51,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994554768] [2021-03-11 00:07:51,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:07:51,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:07:51,435 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2021-03-11 00:07:51,578 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2021-03-11 00:07:52,187 WARN L205 SmtUtils]: Spent 567.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 31 [2021-03-11 00:07:52,786 WARN L205 SmtUtils]: Spent 568.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2021-03-11 00:07:53,324 WARN L205 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-03-11 00:07:53,832 WARN L205 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2021-03-11 00:07:54,046 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 16 [2021-03-11 00:07:54,252 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 12 [2021-03-11 00:07:54,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:07:54,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994554768] [2021-03-11 00:07:54,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867211419] [2021-03-11 00:07:54,258 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:07:54,279 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:07:54,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:07:54,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:07:54,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:07:54,727 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-03-11 00:07:55,000 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-11 00:07:55,646 WARN L205 SmtUtils]: Spent 399.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-11 00:07:56,205 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-03-11 00:07:57,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:57,606 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:07:57,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:07:57,617 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:57,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:57,698 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:07:57,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:07:57,724 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:59,642 WARN L205 SmtUtils]: Spent 1.92 s on a formula simplification. DAG size of input: 79 DAG size of output: 78 [2021-03-11 00:07:59,644 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.4 percent of original size [2021-03-11 00:07:59,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:59,784 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:07:59,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:07:59,809 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:59,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:59,959 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2021-03-11 00:07:59,961 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:07:59,961 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-03-11 00:07:59,968 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:02,315 WARN L205 SmtUtils]: Spent 2.35 s on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2021-03-11 00:08:02,316 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.1 percent of original size [2021-03-11 00:08:02,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:02,451 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:02,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-11 00:08:02,492 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:02,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:02,633 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:08:02,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:08:02,645 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:03,645 WARN L205 SmtUtils]: Spent 1000.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-03-11 00:08:03,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:03,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:03,818 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2021-03-11 00:08:03,820 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:08:03,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-11 00:08:03,830 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:03,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:03,976 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2021-03-11 00:08:03,978 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:08:03,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-03-11 00:08:04,006 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:04,981 WARN L205 SmtUtils]: Spent 975.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-03-11 00:08:04,983 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:05,062 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:08:05,063 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:365, output treesize:253 [2021-03-11 00:08:06,758 WARN L205 SmtUtils]: Spent 1.57 s on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-03-11 00:08:07,352 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 20 [2021-03-11 00:08:07,510 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:07,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:08:07,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:08:07,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060358960] [2021-03-11 00:08:07,511 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:08:07,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:08:07,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:08:07,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:08:07,511 INFO L87 Difference]: Start difference. First operand 2084 states and 7080 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) [2021-03-11 00:08:08,141 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 20 [2021-03-11 00:08:09,338 WARN L205 SmtUtils]: Spent 946.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 32 [2021-03-11 00:08:10,577 WARN L205 SmtUtils]: Spent 632.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 26 [2021-03-11 00:08:10,988 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2021-03-11 00:08:11,689 WARN L205 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-03-11 00:08:12,554 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-11 00:08:13,163 WARN L205 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-03-11 00:08:14,253 WARN L205 SmtUtils]: Spent 908.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2021-03-11 00:08:18,387 WARN L205 SmtUtils]: Spent 3.86 s on a formula simplification. DAG size of input: 78 DAG size of output: 57 [2021-03-11 00:08:18,888 WARN L205 SmtUtils]: Spent 393.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-03-11 00:08:19,229 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-11 00:08:20,234 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-03-11 00:08:21,288 WARN L205 SmtUtils]: Spent 749.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-03-11 00:08:21,570 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-11 00:08:23,234 WARN L205 SmtUtils]: Spent 804.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-11 00:08:24,352 WARN L205 SmtUtils]: Spent 841.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 31 [2021-03-11 00:08:24,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:08:24,637 INFO L93 Difference]: Finished difference Result 2840 states and 9400 transitions. [2021-03-11 00:08:24,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-11 00:08:24,644 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 [2021-03-11 00:08:24,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:08:24,650 INFO L225 Difference]: With dead ends: 2840 [2021-03-11 00:08:24,650 INFO L226 Difference]: Without dead ends: 2815 [2021-03-11 00:08:24,650 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 20059.4ms TimeCoverageRelationStatistics Valid=258, Invalid=932, Unknown=0, NotChecked=0, Total=1190 [2021-03-11 00:08:24,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2815 states. [2021-03-11 00:08:24,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2815 to 2080. [2021-03-11 00:08:24,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2080 states, 2079 states have (on average 3.4006734006734005) internal successors, (7070), 2079 states have internal predecessors, (7070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:24,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2080 states to 2080 states and 7070 transitions. [2021-03-11 00:08:24,688 INFO L78 Accepts]: Start accepts. Automaton has 2080 states and 7070 transitions. Word has length 26 [2021-03-11 00:08:24,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:08:24,688 INFO L480 AbstractCegarLoop]: Abstraction has 2080 states and 7070 transitions. [2021-03-11 00:08:24,688 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) [2021-03-11 00:08:24,688 INFO L276 IsEmpty]: Start isEmpty. Operand 2080 states and 7070 transitions. [2021-03-11 00:08:24,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:08:24,691 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:08:24,691 INFO L519 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] [2021-03-11 00:08:24,891 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3086 [2021-03-11 00:08:24,892 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:08:24,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:08:24,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1779804462, now seen corresponding path program 63 times [2021-03-11 00:08:24,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:08:24,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622158999] [2021-03-11 00:08:24,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:08:24,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:25,067 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 14 [2021-03-11 00:08:25,389 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-03-11 00:08:25,827 WARN L205 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 28 [2021-03-11 00:08:26,237 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 26 [2021-03-11 00:08:26,542 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 20 [2021-03-11 00:08:27,004 WARN L205 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 25 [2021-03-11 00:08:27,501 WARN L205 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-03-11 00:08:27,749 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 17 [2021-03-11 00:08:27,987 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2021-03-11 00:08:27,992 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:27,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622158999] [2021-03-11 00:08:27,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544225419] [2021-03-11 00:08:27,993 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:08:28,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:08:28,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:08:28,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-11 00:08:28,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:08:28,665 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-03-11 00:08:29,349 WARN L205 SmtUtils]: Spent 399.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-11 00:08:30,894 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-03-11 00:08:32,369 WARN L205 SmtUtils]: Spent 1.14 s on a formula simplification that was a NOOP. DAG size: 70 [2021-03-11 00:08:34,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:34,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:34,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:34,645 INFO L244 Elim1Store]: Index analysis took 115 ms [2021-03-11 00:08:34,772 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2021-03-11 00:08:34,774 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:34,774 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 [2021-03-11 00:08:34,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:34,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:34,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:34,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:35,149 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2021-03-11 00:08:35,151 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-03-11 00:08:35,151 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 40 [2021-03-11 00:08:35,193 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:37,926 WARN L205 SmtUtils]: Spent 2.73 s on a formula simplification that was a NOOP. DAG size: 169 [2021-03-11 00:08:37,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:37,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:37,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:37,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:38,057 INFO L244 Elim1Store]: Index analysis took 108 ms [2021-03-11 00:08:38,169 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 9 [2021-03-11 00:08:38,171 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-03-11 00:08:38,171 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 [2021-03-11 00:08:38,183 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:38,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:38,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:38,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:38,379 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 9 [2021-03-11 00:08:38,380 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-03-11 00:08:38,381 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 [2021-03-11 00:08:38,393 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:43,553 WARN L205 SmtUtils]: Spent 5.16 s on a formula simplification. DAG size of input: 162 DAG size of output: 160 [2021-03-11 00:08:43,556 INFO L628 ElimStorePlain]: treesize reduction 38, result has 95.2 percent of original size [2021-03-11 00:08:43,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:43,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:43,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:43,678 INFO L244 Elim1Store]: Index analysis took 103 ms [2021-03-11 00:08:43,803 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 9 [2021-03-11 00:08:43,805 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-03-11 00:08:43,805 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 [2021-03-11 00:08:43,816 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:43,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:43,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:43,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:44,005 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 9 [2021-03-11 00:08:44,007 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-03-11 00:08:44,007 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 [2021-03-11 00:08:44,020 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:46,513 WARN L205 SmtUtils]: Spent 2.49 s on a formula simplification that was a NOOP. DAG size: 153 [2021-03-11 00:08:46,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:46,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:46,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:46,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:46,746 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2021-03-11 00:08:46,748 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-03-11 00:08:46,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 43 [2021-03-11 00:08:46,758 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:46,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:46,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:46,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:46,917 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2021-03-11 00:08:46,919 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:46,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 47 [2021-03-11 00:08:46,960 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:52,254 WARN L205 SmtUtils]: Spent 5.29 s on a formula simplification. DAG size of input: 160 DAG size of output: 153 [2021-03-11 00:08:52,257 INFO L628 ElimStorePlain]: treesize reduction 30, result has 95.9 percent of original size [2021-03-11 00:08:52,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:52,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:52,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:52,522 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-03-11 00:08:52,524 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-03-11 00:08:52,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 43 [2021-03-11 00:08:52,545 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:52,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:52,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:52,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:52,776 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 16 [2021-03-11 00:08:52,778 INFO L354 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2021-03-11 00:08:52,779 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 36 [2021-03-11 00:08:52,811 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. Received shutdown request... [2021-03-11 00:08:53,025 WARN L222 SmtUtils]: Removed 2 from assertion stack [2021-03-11 00:08:53,226 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3142 [2021-03-11 00:08:53,226 WARN L545 AbstractCegarLoop]: Verification canceled [2021-03-11 00:08:53,230 WARN L224 ceAbstractionStarter]: Timeout [2021-03-11 00:08:53,230 INFO L202 PluginConnector]: Adding new model max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.03 12:08:53 BasicIcfg [2021-03-11 00:08:53,230 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-11 00:08:53,231 INFO L168 Benchmark]: Toolchain (without parser) took 840343.49 ms. Allocated memory was 255.9 MB in the beginning and 446.7 MB in the end (delta: 190.8 MB). Free memory was 236.6 MB in the beginning and 395.8 MB in the end (delta: -159.2 MB). Peak memory consumption was 268.0 MB. Max. memory is 16.0 GB. [2021-03-11 00:08:53,231 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.08 ms. Allocated memory is still 255.9 MB. Free memory is still 237.8 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 00:08:53,231 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.99 ms. Allocated memory is still 255.9 MB. Free memory was 236.1 MB in the beginning and 234.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 00:08:53,231 INFO L168 Benchmark]: Boogie Preprocessor took 13.35 ms. Allocated memory is still 255.9 MB. Free memory was 234.7 MB in the beginning and 233.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 00:08:53,231 INFO L168 Benchmark]: RCFGBuilder took 185.28 ms. Allocated memory is still 255.9 MB. Free memory was 233.5 MB in the beginning and 237.3 MB in the end (delta: -3.8 MB). Peak memory consumption was 19.9 MB. Max. memory is 16.0 GB. [2021-03-11 00:08:53,231 INFO L168 Benchmark]: TraceAbstraction took 840118.94 ms. Allocated memory was 255.9 MB in the beginning and 446.7 MB in the end (delta: 190.8 MB). Free memory was 236.6 MB in the beginning and 395.8 MB in the end (delta: -159.1 MB). Peak memory consumption was 267.0 MB. Max. memory is 16.0 GB. [2021-03-11 00:08:53,231 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 0.08 ms. Allocated memory is still 255.9 MB. Free memory is still 237.8 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 19.99 ms. Allocated memory is still 255.9 MB. Free memory was 236.1 MB in the beginning and 234.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 13.35 ms. Allocated memory is still 255.9 MB. Free memory was 234.7 MB in the beginning and 233.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 185.28 ms. Allocated memory is still 255.9 MB. Free memory was 233.5 MB in the beginning and 237.3 MB in the end (delta: -3.8 MB). Peak memory consumption was 19.9 MB. Max. memory is 16.0 GB. * TraceAbstraction took 840118.94 ms. Allocated memory was 255.9 MB in the beginning and 446.7 MB in the end (delta: 190.8 MB). Free memory was 236.6 MB in the beginning and 395.8 MB in the end (delta: -159.1 MB). Peak memory consumption was 267.0 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 146 for 211ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 840063.9ms, OverallIterations: 113, TraceHistogramMax: 2, EmptinessCheckTime: 239.9ms, AutomataDifference: 482439.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 19.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4507 SDtfs, 22740 SDslu, 33008 SDs, 0 SdLazy, 61689 SolverSat, 3695 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 54602.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5912 GetRequests, 2043 SyntacticMatches, 115 SemanticMatches, 3754 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43277 ImplicationChecksByTransitivity, 530276.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2087occurred in iteration=110, InterpolantAutomatonStates: 2868, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 2478.9ms AutomataMinimizationTime, 112 MinimizatonAttempts, 77158 StatesRemovedByMinimization, 112 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 333.2ms SsaConstructionTime, 1203.8ms SatisfiabilityAnalysisTime, 300901.7ms InterpolantComputationTime, 5558 NumberOfCodeBlocks, 5558 NumberOfCodeBlocksAsserted, 352 NumberOfCheckSat, 5337 ConstructedInterpolants, 107 QuantifiedInterpolants, 169867 SizeOfPredicates, 621 NumberOfNonLiveVariables, 7202 ConjunctsInSsa, 2222 ConjunctsInUnsatCore, 221 InterpolantComputations, 3 PerfectInterpolantSequences, 107/1306 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