/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/chl/array-int-trans.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a865e3bea3ade1065a4c95009cfa501fe03c5538-a865e3b [2021-02-19 17:42:19,494 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 17:42:19,496 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 17:42:19,517 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-19 17:42:19,537 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-19 17:42:19,537 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-19 17:42:19,538 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-19 17:42:19,538 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 [2021-02-19 17:42:19,552 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 17:42:19,552 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 17:42:19,552 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-02-19 17:42:19,552 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-02-19 17:42:19,553 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 17:42:19,553 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 17:42:19,553 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 17:42:19,553 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 17:42:19,554 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 17:42:19,554 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 17:42:19,554 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 17:42:19,554 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 17:42:19,554 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 17:42:19,554 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 17:42:19,554 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 17:42:19,554 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 17:42:19,554 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 17:42:19,554 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 17:42:19,554 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 17:42:19,555 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 17:42:19,555 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 17:42:19,555 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-19 17:42:19,555 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 17:42:19,555 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 17:42:19,555 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 17:42:19,555 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 17:42:19,555 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 17:42:19,555 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 17:42:19,555 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 17:42:19,555 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-02-19 17:42:19,556 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 17:42:19,556 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 17:42:19,787 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 17:42:19,803 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 17:42:19,804 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 17:42:19,805 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-02-19 17:42:19,805 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-02-19 17:42:19,808 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/array-int-trans.wvr.bpl [2021-02-19 17:42:19,808 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/array-int-trans.wvr.bpl' [2021-02-19 17:42:19,825 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 17:42:19,828 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 17:42:19,829 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-02-19 17:42:19,829 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-02-19 17:42:19,829 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-02-19 17:42:19,839 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:42:19" (1/1) ... [2021-02-19 17:42:19,844 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:42:19" (1/1) ... [2021-02-19 17:42:19,850 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-02-19 17:42:19,851 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 17:42:19,851 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 17:42:19,852 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 17:42:19,856 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:42:19" (1/1) ... [2021-02-19 17:42:19,856 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:42:19" (1/1) ... [2021-02-19 17:42:19,865 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:42:19" (1/1) ... [2021-02-19 17:42:19,865 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:42:19" (1/1) ... [2021-02-19 17:42:19,871 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:42:19" (1/1) ... [2021-02-19 17:42:19,873 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:42:19" (1/1) ... [2021-02-19 17:42:19,874 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:42:19" (1/1) ... [2021-02-19 17:42:19,875 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 17:42:19,875 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 17:42:19,875 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 17:42:19,875 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 17:42:19,876 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:42:19" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 17:42:19,922 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-02-19 17:42:19,923 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-02-19 17:42:19,923 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-02-19 17:42:19,923 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-02-19 17:42:19,923 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-02-19 17:42:19,923 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-02-19 17:42:19,923 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-02-19 17:42:19,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 17:42:19,923 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 17:42:19,923 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-02-19 17:42:19,923 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-02-19 17:42:19,924 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-02-19 17:42:19,924 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-02-19 17:42:20,185 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 17:42:20,185 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-02-19 17:42:20,186 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-02-19 17:42:20,186 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-02-19 17:42:20,186 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2021-02-19 17:42:20,187 INFO L202 PluginConnector]: Adding new model array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 05:42:20 BoogieIcfgContainer [2021-02-19 17:42:20,187 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 17:42:20,188 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 17:42:20,188 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 17:42:20,190 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 17:42:20,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:42:19" (1/2) ... [2021-02-19 17:42:20,190 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21847002 and model type array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 05:42:20, skipping insertion in model container [2021-02-19 17:42:20,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 05:42:20" (2/2) ... [2021-02-19 17:42:20,191 INFO L111 eAbstractionObserver]: Analyzing ICFG array-int-trans.wvr.bpl [2021-02-19 17:42:20,194 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-02-19 17:42:20,195 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 17:42:20,197 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 17:42:20,197 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-02-19 17:42:20,217 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-02-19 17:42:20,228 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-02-19 17:42:20,255 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 17:42:20,255 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 17:42:20,255 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 17:42:20,255 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 17:42:20,255 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 17:42:20,255 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 17:42:20,255 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 17:42:20,255 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 17:42:20,275 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 29 places, 22 transitions, 68 flow [2021-02-19 17:42:20,286 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 57 states, 55 states have (on average 2.7818181818181817) internal successors, (153), 56 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:20,287 INFO L276 IsEmpty]: Start isEmpty. Operand has 57 states, 55 states have (on average 2.7818181818181817) internal successors, (153), 56 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:20,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-02-19 17:42:20,291 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:20,291 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:20,292 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:20,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:20,296 INFO L82 PathProgramCache]: Analyzing trace with hash -2084068043, now seen corresponding path program 1 times [2021-02-19 17:42:20,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:20,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538013809] [2021-02-19 17:42:20,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:20,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:20,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:20,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538013809] [2021-02-19 17:42:20,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:42:20,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 17:42:20,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234155367] [2021-02-19 17:42:20,452 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 17:42:20,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:20,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 17:42:20,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:42:20,461 INFO L87 Difference]: Start difference. First operand has 57 states, 55 states have (on average 2.7818181818181817) internal successors, (153), 56 states have internal predecessors, (153), 0 states have call successors, (0), 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 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:20,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:20,539 INFO L93 Difference]: Finished difference Result 139 states and 379 transitions. [2021-02-19 17:42:20,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:42:20,540 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-02-19 17:42:20,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:20,547 INFO L225 Difference]: With dead ends: 139 [2021-02-19 17:42:20,547 INFO L226 Difference]: Without dead ends: 135 [2021-02-19 17:42:20,548 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:42:20,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-02-19 17:42:20,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 84. [2021-02-19 17:42:20,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.819277108433735) internal successors, (234), 83 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:20,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 234 transitions. [2021-02-19 17:42:20,573 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 234 transitions. Word has length 14 [2021-02-19 17:42:20,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:20,574 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 234 transitions. [2021-02-19 17:42:20,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:20,574 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 234 transitions. [2021-02-19 17:42:20,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-02-19 17:42:20,575 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:20,575 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:20,575 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 17:42:20,575 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:20,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:20,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1063670149, now seen corresponding path program 2 times [2021-02-19 17:42:20,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:20,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058369282] [2021-02-19 17:42:20,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:20,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:20,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:20,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058369282] [2021-02-19 17:42:20,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:42:20,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 17:42:20,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115570270] [2021-02-19 17:42:20,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 17:42:20,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:20,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 17:42:20,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:42:20,607 INFO L87 Difference]: Start difference. First operand 84 states and 234 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:20,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:20,668 INFO L93 Difference]: Finished difference Result 156 states and 429 transitions. [2021-02-19 17:42:20,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:42:20,668 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-02-19 17:42:20,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:20,670 INFO L225 Difference]: With dead ends: 156 [2021-02-19 17:42:20,670 INFO L226 Difference]: Without dead ends: 152 [2021-02-19 17:42:20,671 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:42:20,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-02-19 17:42:20,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 90. [2021-02-19 17:42:20,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.831460674157303) internal successors, (252), 89 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:20,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 252 transitions. [2021-02-19 17:42:20,694 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 252 transitions. Word has length 14 [2021-02-19 17:42:20,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:20,694 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 252 transitions. [2021-02-19 17:42:20,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:20,695 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 252 transitions. [2021-02-19 17:42:20,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-02-19 17:42:20,695 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:20,695 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:20,696 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-19 17:42:20,696 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:20,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:20,696 INFO L82 PathProgramCache]: Analyzing trace with hash 284972223, now seen corresponding path program 3 times [2021-02-19 17:42:20,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:20,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838576756] [2021-02-19 17:42:20,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:20,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:20,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:20,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838576756] [2021-02-19 17:42:20,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:42:20,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 17:42:20,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008620262] [2021-02-19 17:42:20,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 17:42:20,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:20,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 17:42:20,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:42:20,723 INFO L87 Difference]: Start difference. First operand 90 states and 252 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:20,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:20,794 INFO L93 Difference]: Finished difference Result 169 states and 467 transitions. [2021-02-19 17:42:20,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:42:20,795 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-02-19 17:42:20,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:20,797 INFO L225 Difference]: With dead ends: 169 [2021-02-19 17:42:20,797 INFO L226 Difference]: Without dead ends: 165 [2021-02-19 17:42:20,798 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:42:20,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-02-19 17:42:20,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 94. [2021-02-19 17:42:20,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.838709677419355) internal successors, (264), 93 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:20,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 264 transitions. [2021-02-19 17:42:20,817 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 264 transitions. Word has length 14 [2021-02-19 17:42:20,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:20,817 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 264 transitions. [2021-02-19 17:42:20,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:20,817 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 264 transitions. [2021-02-19 17:42:20,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-02-19 17:42:20,818 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:20,818 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:20,818 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-19 17:42:20,818 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:20,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:20,819 INFO L82 PathProgramCache]: Analyzing trace with hash -791725643, now seen corresponding path program 4 times [2021-02-19 17:42:20,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:20,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45370966] [2021-02-19 17:42:20,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:20,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:20,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:20,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45370966] [2021-02-19 17:42:20,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:42:20,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 17:42:20,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358618954] [2021-02-19 17:42:20,864 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 17:42:20,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:20,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 17:42:20,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:42:20,865 INFO L87 Difference]: Start difference. First operand 94 states and 264 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:20,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:20,930 INFO L93 Difference]: Finished difference Result 173 states and 479 transitions. [2021-02-19 17:42:20,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:42:20,930 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-02-19 17:42:20,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:20,932 INFO L225 Difference]: With dead ends: 173 [2021-02-19 17:42:20,932 INFO L226 Difference]: Without dead ends: 169 [2021-02-19 17:42:20,932 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:42:20,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-02-19 17:42:20,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 98. [2021-02-19 17:42:20,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.845360824742268) internal successors, (276), 97 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:20,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 276 transitions. [2021-02-19 17:42:20,944 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 276 transitions. Word has length 14 [2021-02-19 17:42:20,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:20,944 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 276 transitions. [2021-02-19 17:42:20,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:20,944 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 276 transitions. [2021-02-19 17:42:20,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-02-19 17:42:20,947 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:20,947 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:20,947 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-19 17:42:20,947 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:20,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:20,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1403359925, now seen corresponding path program 5 times [2021-02-19 17:42:20,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:20,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299218729] [2021-02-19 17:42:20,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:20,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:20,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:20,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299218729] [2021-02-19 17:42:20,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:42:20,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 17:42:20,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179160956] [2021-02-19 17:42:20,982 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 17:42:20,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:20,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 17:42:20,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:42:20,983 INFO L87 Difference]: Start difference. First operand 98 states and 276 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:21,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:21,036 INFO L93 Difference]: Finished difference Result 176 states and 489 transitions. [2021-02-19 17:42:21,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:42:21,037 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-02-19 17:42:21,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:21,037 INFO L225 Difference]: With dead ends: 176 [2021-02-19 17:42:21,037 INFO L226 Difference]: Without dead ends: 172 [2021-02-19 17:42:21,038 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:42:21,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-02-19 17:42:21,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 100. [2021-02-19 17:42:21,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.8484848484848486) internal successors, (282), 99 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:21,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 282 transitions. [2021-02-19 17:42:21,041 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 282 transitions. Word has length 14 [2021-02-19 17:42:21,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:21,041 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 282 transitions. [2021-02-19 17:42:21,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:21,041 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 282 transitions. [2021-02-19 17:42:21,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-02-19 17:42:21,046 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:21,047 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:21,047 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-19 17:42:21,047 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:21,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:21,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1756875243, now seen corresponding path program 6 times [2021-02-19 17:42:21,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:21,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476187676] [2021-02-19 17:42:21,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:21,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:21,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:21,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476187676] [2021-02-19 17:42:21,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:42:21,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 17:42:21,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667663810] [2021-02-19 17:42:21,087 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 17:42:21,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:21,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 17:42:21,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:42:21,088 INFO L87 Difference]: Start difference. First operand 100 states and 282 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:21,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:21,153 INFO L93 Difference]: Finished difference Result 174 states and 483 transitions. [2021-02-19 17:42:21,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:42:21,153 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-02-19 17:42:21,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:21,154 INFO L225 Difference]: With dead ends: 174 [2021-02-19 17:42:21,154 INFO L226 Difference]: Without dead ends: 170 [2021-02-19 17:42:21,155 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:42:21,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-02-19 17:42:21,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 100. [2021-02-19 17:42:21,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.8484848484848486) internal successors, (282), 99 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:21,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 282 transitions. [2021-02-19 17:42:21,159 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 282 transitions. Word has length 14 [2021-02-19 17:42:21,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:21,159 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 282 transitions. [2021-02-19 17:42:21,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:21,159 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 282 transitions. [2021-02-19 17:42:21,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:42:21,159 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:21,160 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:21,160 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-19 17:42:21,160 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:21,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:21,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1483039111, now seen corresponding path program 1 times [2021-02-19 17:42:21,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:21,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676905985] [2021-02-19 17:42:21,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:21,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:21,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:21,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676905985] [2021-02-19 17:42:21,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719838385] [2021-02-19 17:42:21,233 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 [2021-02-19 17:42:21,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:21,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:42:21,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:21,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:21,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:21,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-02-19 17:42:21,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591849253] [2021-02-19 17:42:21,471 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:42:21,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:21,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:42:21,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:42:21,472 INFO L87 Difference]: Start difference. First operand 100 states and 282 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:21,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:21,559 INFO L93 Difference]: Finished difference Result 179 states and 476 transitions. [2021-02-19 17:42:21,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 17:42:21,559 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-02-19 17:42:21,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:21,560 INFO L225 Difference]: With dead ends: 179 [2021-02-19 17:42:21,560 INFO L226 Difference]: Without dead ends: 157 [2021-02-19 17:42:21,560 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:42:21,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-02-19 17:42:21,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 113. [2021-02-19 17:42:21,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.8214285714285716) internal successors, (316), 112 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:21,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 316 transitions. [2021-02-19 17:42:21,567 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 316 transitions. Word has length 15 [2021-02-19 17:42:21,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:21,567 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 316 transitions. [2021-02-19 17:42:21,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:21,567 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 316 transitions. [2021-02-19 17:42:21,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:42:21,567 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:21,567 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:21,786 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-02-19 17:42:21,786 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:21,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:21,786 INFO L82 PathProgramCache]: Analyzing trace with hash -180956419, now seen corresponding path program 1 times [2021-02-19 17:42:21,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:21,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131937598] [2021-02-19 17:42:21,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:21,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:21,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:21,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131937598] [2021-02-19 17:42:21,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165960007] [2021-02-19 17:42:21,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:21,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:21,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:42:21,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:21,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:21,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:21,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-02-19 17:42:21,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186251267] [2021-02-19 17:42:21,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:42:21,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:21,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:42:21,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:42:21,970 INFO L87 Difference]: Start difference. First operand 113 states and 316 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:22,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:22,073 INFO L93 Difference]: Finished difference Result 173 states and 446 transitions. [2021-02-19 17:42:22,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:42:22,073 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-02-19 17:42:22,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:22,074 INFO L225 Difference]: With dead ends: 173 [2021-02-19 17:42:22,074 INFO L226 Difference]: Without dead ends: 150 [2021-02-19 17:42:22,074 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:42:22,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-02-19 17:42:22,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 110. [2021-02-19 17:42:22,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.8073394495412844) internal successors, (306), 109 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:22,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 306 transitions. [2021-02-19 17:42:22,077 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 306 transitions. Word has length 15 [2021-02-19 17:42:22,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:22,077 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 306 transitions. [2021-02-19 17:42:22,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:22,077 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 306 transitions. [2021-02-19 17:42:22,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:42:22,078 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:22,078 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:22,296 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:22,297 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:22,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:22,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1385320275, now seen corresponding path program 2 times [2021-02-19 17:42:22,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:22,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367696620] [2021-02-19 17:42:22,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:22,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:22,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:22,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367696620] [2021-02-19 17:42:22,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581447413] [2021-02-19 17:42:22,345 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 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 [2021-02-19 17:42:22,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:42:22,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:22,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:42:22,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:22,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:22,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:22,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-02-19 17:42:22,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202683608] [2021-02-19 17:42:22,481 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:42:22,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:22,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:42:22,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:42:22,481 INFO L87 Difference]: Start difference. First operand 110 states and 306 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:22,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:22,602 INFO L93 Difference]: Finished difference Result 193 states and 494 transitions. [2021-02-19 17:42:22,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:42:22,602 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-02-19 17:42:22,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:22,603 INFO L225 Difference]: With dead ends: 193 [2021-02-19 17:42:22,603 INFO L226 Difference]: Without dead ends: 177 [2021-02-19 17:42:22,603 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:42:22,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-02-19 17:42:22,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 119. [2021-02-19 17:42:22,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.76271186440678) internal successors, (326), 118 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:22,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 326 transitions. [2021-02-19 17:42:22,608 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 326 transitions. Word has length 15 [2021-02-19 17:42:22,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:22,608 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 326 transitions. [2021-02-19 17:42:22,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:22,608 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 326 transitions. [2021-02-19 17:42:22,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:42:22,609 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:22,609 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:22,813 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-02-19 17:42:22,814 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:22,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:22,814 INFO L82 PathProgramCache]: Analyzing trace with hash 951224249, now seen corresponding path program 3 times [2021-02-19 17:42:22,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:22,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456082298] [2021-02-19 17:42:22,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:22,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:22,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:22,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456082298] [2021-02-19 17:42:22,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502856374] [2021-02-19 17:42:22,875 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:22,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 17:42:22,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:22,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:42:22,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:22,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:22,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:22,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-02-19 17:42:22,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73305237] [2021-02-19 17:42:22,982 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:42:22,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:22,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:42:22,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:42:22,983 INFO L87 Difference]: Start difference. First operand 119 states and 326 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:23,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:23,428 INFO L93 Difference]: Finished difference Result 240 states and 644 transitions. [2021-02-19 17:42:23,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:42:23,428 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-02-19 17:42:23,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:23,429 INFO L225 Difference]: With dead ends: 240 [2021-02-19 17:42:23,429 INFO L226 Difference]: Without dead ends: 188 [2021-02-19 17:42:23,430 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=398, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:42:23,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-02-19 17:42:23,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 114. [2021-02-19 17:42:23,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.8584070796460175) internal successors, (323), 113 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:23,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 323 transitions. [2021-02-19 17:42:23,433 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 323 transitions. Word has length 15 [2021-02-19 17:42:23,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:23,433 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 323 transitions. [2021-02-19 17:42:23,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:23,433 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 323 transitions. [2021-02-19 17:42:23,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:42:23,433 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:23,433 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:23,642 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:23,642 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:23,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:23,643 INFO L82 PathProgramCache]: Analyzing trace with hash 479849411, now seen corresponding path program 1 times [2021-02-19 17:42:23,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:23,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093838187] [2021-02-19 17:42:23,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:23,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:23,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:23,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093838187] [2021-02-19 17:42:23,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687764343] [2021-02-19 17:42:23,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-02-19 17:42:23,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:23,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:42:23,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:23,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:23,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:23,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-02-19 17:42:23,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544857852] [2021-02-19 17:42:23,753 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:42:23,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:23,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:42:23,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:42:23,754 INFO L87 Difference]: Start difference. First operand 114 states and 323 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:23,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:23,872 INFO L93 Difference]: Finished difference Result 191 states and 526 transitions. [2021-02-19 17:42:23,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:42:23,873 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-02-19 17:42:23,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:23,874 INFO L225 Difference]: With dead ends: 191 [2021-02-19 17:42:23,874 INFO L226 Difference]: Without dead ends: 186 [2021-02-19 17:42:23,874 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:42:23,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-02-19 17:42:23,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 122. [2021-02-19 17:42:23,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.909090909090909) internal successors, (352), 121 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:23,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 352 transitions. [2021-02-19 17:42:23,877 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 352 transitions. Word has length 15 [2021-02-19 17:42:23,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:23,877 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 352 transitions. [2021-02-19 17:42:23,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:23,877 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 352 transitions. [2021-02-19 17:42:23,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:42:23,878 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:23,878 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:24,090 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-02-19 17:42:24,090 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:24,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:24,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1061667641, now seen corresponding path program 2 times [2021-02-19 17:42:24,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:24,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574616789] [2021-02-19 17:42:24,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:24,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:24,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:24,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574616789] [2021-02-19 17:42:24,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342459942] [2021-02-19 17:42:24,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:42:24,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:42:24,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:24,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:42:24,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:24,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:24,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:24,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-02-19 17:42:24,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617382037] [2021-02-19 17:42:24,226 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:42:24,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:24,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:42:24,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:42:24,227 INFO L87 Difference]: Start difference. First operand 122 states and 352 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:24,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:24,467 INFO L93 Difference]: Finished difference Result 222 states and 617 transitions. [2021-02-19 17:42:24,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:42:24,467 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-02-19 17:42:24,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:24,470 INFO L225 Difference]: With dead ends: 222 [2021-02-19 17:42:24,470 INFO L226 Difference]: Without dead ends: 203 [2021-02-19 17:42:24,471 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:42:24,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-02-19 17:42:24,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 128. [2021-02-19 17:42:24,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.937007874015748) internal successors, (373), 127 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:24,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 373 transitions. [2021-02-19 17:42:24,474 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 373 transitions. Word has length 15 [2021-02-19 17:42:24,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:24,475 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 373 transitions. [2021-02-19 17:42:24,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:24,475 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 373 transitions. [2021-02-19 17:42:24,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:42:24,475 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:24,475 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:24,682 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-02-19 17:42:24,682 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:24,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:24,682 INFO L82 PathProgramCache]: Analyzing trace with hash 425708387, now seen corresponding path program 2 times [2021-02-19 17:42:24,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:24,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610789929] [2021-02-19 17:42:24,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:24,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:24,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:24,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610789929] [2021-02-19 17:42:24,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982861547] [2021-02-19 17:42:24,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:24,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:42:24,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:24,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:42:24,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:24,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:24,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:24,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-02-19 17:42:24,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505798295] [2021-02-19 17:42:24,831 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:42:24,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:24,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:42:24,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:42:24,832 INFO L87 Difference]: Start difference. First operand 128 states and 373 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:25,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:25,209 INFO L93 Difference]: Finished difference Result 285 states and 767 transitions. [2021-02-19 17:42:25,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:42:25,210 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-02-19 17:42:25,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:25,212 INFO L225 Difference]: With dead ends: 285 [2021-02-19 17:42:25,212 INFO L226 Difference]: Without dead ends: 246 [2021-02-19 17:42:25,212 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:42:25,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-02-19 17:42:25,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 143. [2021-02-19 17:42:25,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 3.056338028169014) internal successors, (434), 142 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:25,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 434 transitions. [2021-02-19 17:42:25,226 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 434 transitions. Word has length 15 [2021-02-19 17:42:25,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:25,227 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 434 transitions. [2021-02-19 17:42:25,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:25,227 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 434 transitions. [2021-02-19 17:42:25,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:42:25,227 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:25,227 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:25,427 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:25,428 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:25,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:25,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1238287143, now seen corresponding path program 4 times [2021-02-19 17:42:25,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:25,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286617093] [2021-02-19 17:42:25,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:25,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:25,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:25,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286617093] [2021-02-19 17:42:25,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977168339] [2021-02-19 17:42:25,468 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 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 [2021-02-19 17:42:25,490 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:42:25,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:25,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:42:25,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:25,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:25,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:25,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-02-19 17:42:25,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902510193] [2021-02-19 17:42:25,575 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:42:25,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:25,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:42:25,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:42:25,576 INFO L87 Difference]: Start difference. First operand 143 states and 434 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 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) [2021-02-19 17:42:25,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:25,662 INFO L93 Difference]: Finished difference Result 240 states and 643 transitions. [2021-02-19 17:42:25,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:42:25,662 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 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 15 [2021-02-19 17:42:25,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:25,663 INFO L225 Difference]: With dead ends: 240 [2021-02-19 17:42:25,663 INFO L226 Difference]: Without dead ends: 217 [2021-02-19 17:42:25,664 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:42:25,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-02-19 17:42:25,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 145. [2021-02-19 17:42:25,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 3.0277777777777777) internal successors, (436), 144 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:25,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 436 transitions. [2021-02-19 17:42:25,667 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 436 transitions. Word has length 15 [2021-02-19 17:42:25,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:25,667 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 436 transitions. [2021-02-19 17:42:25,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 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) [2021-02-19 17:42:25,668 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 436 transitions. [2021-02-19 17:42:25,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:42:25,668 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:25,668 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:25,875 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-02-19 17:42:25,875 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:25,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:25,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1919639099, now seen corresponding path program 5 times [2021-02-19 17:42:25,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:25,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659096431] [2021-02-19 17:42:25,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:25,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:25,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:25,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659096431] [2021-02-19 17:42:25,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040541709] [2021-02-19 17:42:25,912 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:42:25,941 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:42:25,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:25,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:42:25,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:25,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:25,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:25,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-02-19 17:42:25,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122960954] [2021-02-19 17:42:25,986 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:42:25,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:25,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:42:25,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:42:25,986 INFO L87 Difference]: Start difference. First operand 145 states and 436 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:26,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:26,062 INFO L93 Difference]: Finished difference Result 226 states and 636 transitions. [2021-02-19 17:42:26,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 17:42:26,063 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-02-19 17:42:26,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:26,064 INFO L225 Difference]: With dead ends: 226 [2021-02-19 17:42:26,064 INFO L226 Difference]: Without dead ends: 205 [2021-02-19 17:42:26,064 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:42:26,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-02-19 17:42:26,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 156. [2021-02-19 17:42:26,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.9548387096774196) internal successors, (458), 155 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:26,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 458 transitions. [2021-02-19 17:42:26,067 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 458 transitions. Word has length 15 [2021-02-19 17:42:26,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:26,067 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 458 transitions. [2021-02-19 17:42:26,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:26,068 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 458 transitions. [2021-02-19 17:42:26,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:42:26,068 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:26,068 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:26,282 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:26,282 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:26,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:26,282 INFO L82 PathProgramCache]: Analyzing trace with hash 261780607, now seen corresponding path program 3 times [2021-02-19 17:42:26,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:26,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762212494] [2021-02-19 17:42:26,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:26,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:26,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:26,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762212494] [2021-02-19 17:42:26,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325146207] [2021-02-19 17:42:26,319 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:26,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 17:42:26,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:26,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:42:26,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:26,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:26,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:26,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-02-19 17:42:26,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566623872] [2021-02-19 17:42:26,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:42:26,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:26,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:42:26,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:42:26,422 INFO L87 Difference]: Start difference. First operand 156 states and 458 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:26,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:26,515 INFO L93 Difference]: Finished difference Result 214 states and 602 transitions. [2021-02-19 17:42:26,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:42:26,516 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-02-19 17:42:26,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:26,518 INFO L225 Difference]: With dead ends: 214 [2021-02-19 17:42:26,518 INFO L226 Difference]: Without dead ends: 201 [2021-02-19 17:42:26,518 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:42:26,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-02-19 17:42:26,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 156. [2021-02-19 17:42:26,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.9419354838709677) internal successors, (456), 155 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:26,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 456 transitions. [2021-02-19 17:42:26,523 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 456 transitions. Word has length 15 [2021-02-19 17:42:26,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:26,523 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 456 transitions. [2021-02-19 17:42:26,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:26,523 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 456 transitions. [2021-02-19 17:42:26,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:42:26,524 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:26,524 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:26,741 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:26,742 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:26,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:26,742 INFO L82 PathProgramCache]: Analyzing trace with hash 970591111, now seen corresponding path program 6 times [2021-02-19 17:42:26,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:26,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277972447] [2021-02-19 17:42:26,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:26,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:26,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:26,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277972447] [2021-02-19 17:42:26,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726606737] [2021-02-19 17:42:26,786 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:26,814 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 17:42:26,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:26,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:42:26,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:26,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:26,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:26,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-02-19 17:42:26,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407418438] [2021-02-19 17:42:26,877 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:42:26,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:26,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:42:26,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:42:26,877 INFO L87 Difference]: Start difference. First operand 156 states and 456 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:27,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:27,337 INFO L93 Difference]: Finished difference Result 378 states and 1003 transitions. [2021-02-19 17:42:27,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:42:27,337 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-02-19 17:42:27,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:27,338 INFO L225 Difference]: With dead ends: 378 [2021-02-19 17:42:27,338 INFO L226 Difference]: Without dead ends: 335 [2021-02-19 17:42:27,339 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:42:27,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-02-19 17:42:27,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 175. [2021-02-19 17:42:27,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 3.0804597701149423) internal successors, (536), 174 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:27,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 536 transitions. [2021-02-19 17:42:27,348 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 536 transitions. Word has length 15 [2021-02-19 17:42:27,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:27,348 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 536 transitions. [2021-02-19 17:42:27,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:27,348 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 536 transitions. [2021-02-19 17:42:27,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:42:27,348 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:27,348 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:27,553 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-02-19 17:42:27,554 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:27,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:27,554 INFO L82 PathProgramCache]: Analyzing trace with hash 511165459, now seen corresponding path program 4 times [2021-02-19 17:42:27,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:27,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129077432] [2021-02-19 17:42:27,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:27,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:27,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:27,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129077432] [2021-02-19 17:42:27,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093043826] [2021-02-19 17:42:27,594 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 [2021-02-19 17:42:27,625 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:42:27,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:27,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:42:27,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:27,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:27,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:27,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-02-19 17:42:27,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53685180] [2021-02-19 17:42:27,701 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:42:27,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:27,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:42:27,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:42:27,702 INFO L87 Difference]: Start difference. First operand 175 states and 536 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:27,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:27,802 INFO L93 Difference]: Finished difference Result 262 states and 761 transitions. [2021-02-19 17:42:27,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:42:27,803 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-02-19 17:42:27,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:27,804 INFO L225 Difference]: With dead ends: 262 [2021-02-19 17:42:27,804 INFO L226 Difference]: Without dead ends: 253 [2021-02-19 17:42:27,804 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:42:27,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-02-19 17:42:27,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 177. [2021-02-19 17:42:27,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 3.090909090909091) internal successors, (544), 176 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:27,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 544 transitions. [2021-02-19 17:42:27,808 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 544 transitions. Word has length 15 [2021-02-19 17:42:27,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:27,808 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 544 transitions. [2021-02-19 17:42:27,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:27,808 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 544 transitions. [2021-02-19 17:42:27,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:42:27,809 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:27,809 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:28,021 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:28,022 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:28,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:28,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1191223829, now seen corresponding path program 3 times [2021-02-19 17:42:28,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:28,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194169383] [2021-02-19 17:42:28,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:28,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:28,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:28,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194169383] [2021-02-19 17:42:28,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229819505] [2021-02-19 17:42:28,055 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 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 [2021-02-19 17:42:28,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 17:42:28,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:28,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:42:28,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:28,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:28,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:28,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-02-19 17:42:28,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314281378] [2021-02-19 17:42:28,149 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:42:28,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:28,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:42:28,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:42:28,150 INFO L87 Difference]: Start difference. First operand 177 states and 544 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:28,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:28,505 INFO L93 Difference]: Finished difference Result 287 states and 803 transitions. [2021-02-19 17:42:28,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:42:28,505 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-02-19 17:42:28,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:28,506 INFO L225 Difference]: With dead ends: 287 [2021-02-19 17:42:28,506 INFO L226 Difference]: Without dead ends: 248 [2021-02-19 17:42:28,506 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:42:28,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-02-19 17:42:28,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 174. [2021-02-19 17:42:28,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 3.0751445086705202) internal successors, (532), 173 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:28,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 532 transitions. [2021-02-19 17:42:28,510 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 532 transitions. Word has length 15 [2021-02-19 17:42:28,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:28,510 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 532 transitions. [2021-02-19 17:42:28,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:28,510 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 532 transitions. [2021-02-19 17:42:28,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:42:28,511 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:28,511 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:28,727 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-02-19 17:42:28,727 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:28,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:28,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1872721565, now seen corresponding path program 5 times [2021-02-19 17:42:28,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:28,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589734640] [2021-02-19 17:42:28,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:28,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:28,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:28,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589734640] [2021-02-19 17:42:28,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731890386] [2021-02-19 17:42:28,768 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:28,787 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:42:28,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:28,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:42:28,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:28,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:28,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:28,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-02-19 17:42:28,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916508779] [2021-02-19 17:42:28,857 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:42:28,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:28,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:42:28,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:42:28,858 INFO L87 Difference]: Start difference. First operand 174 states and 532 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:28,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:28,959 INFO L93 Difference]: Finished difference Result 238 states and 697 transitions. [2021-02-19 17:42:28,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:42:28,959 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-02-19 17:42:28,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:28,960 INFO L225 Difference]: With dead ends: 238 [2021-02-19 17:42:28,960 INFO L226 Difference]: Without dead ends: 227 [2021-02-19 17:42:28,960 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:42:28,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-02-19 17:42:28,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 173. [2021-02-19 17:42:28,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 3.0697674418604652) internal successors, (528), 172 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:28,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 528 transitions. [2021-02-19 17:42:28,965 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 528 transitions. Word has length 15 [2021-02-19 17:42:28,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:28,965 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 528 transitions. [2021-02-19 17:42:28,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:28,965 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 528 transitions. [2021-02-19 17:42:28,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:42:28,967 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:28,967 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:29,175 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:29,175 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:29,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:29,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1743626727, now seen corresponding path program 7 times [2021-02-19 17:42:29,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:29,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743300643] [2021-02-19 17:42:29,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:29,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:29,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:29,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743300643] [2021-02-19 17:42:29,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729250599] [2021-02-19 17:42:29,221 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 [2021-02-19 17:42:29,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:29,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:42:29,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:29,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:29,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:29,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 17:42:29,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794461753] [2021-02-19 17:42:29,322 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:42:29,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:29,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:42:29,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:42:29,323 INFO L87 Difference]: Start difference. First operand 173 states and 528 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 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) [2021-02-19 17:42:29,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:29,434 INFO L93 Difference]: Finished difference Result 237 states and 672 transitions. [2021-02-19 17:42:29,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:42:29,435 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 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 15 [2021-02-19 17:42:29,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:29,435 INFO L225 Difference]: With dead ends: 237 [2021-02-19 17:42:29,436 INFO L226 Difference]: Without dead ends: 226 [2021-02-19 17:42:29,436 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:42:29,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-02-19 17:42:29,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 171. [2021-02-19 17:42:29,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 3.070588235294118) internal successors, (522), 170 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:29,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 522 transitions. [2021-02-19 17:42:29,439 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 522 transitions. Word has length 15 [2021-02-19 17:42:29,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:29,439 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 522 transitions. [2021-02-19 17:42:29,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 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) [2021-02-19 17:42:29,439 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 522 transitions. [2021-02-19 17:42:29,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:42:29,440 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:29,440 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:29,640 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-02-19 17:42:29,640 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:29,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:29,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1883825609, now seen corresponding path program 8 times [2021-02-19 17:42:29,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:29,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495615424] [2021-02-19 17:42:29,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:29,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:29,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:29,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495615424] [2021-02-19 17:42:29,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897984950] [2021-02-19 17:42:29,678 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 [2021-02-19 17:42:29,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:42:29,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:29,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:42:29,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:29,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:29,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:29,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-02-19 17:42:29,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611786690] [2021-02-19 17:42:29,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:42:29,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:29,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:42:29,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:42:29,775 INFO L87 Difference]: Start difference. First operand 171 states and 522 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:30,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:30,289 INFO L93 Difference]: Finished difference Result 320 states and 878 transitions. [2021-02-19 17:42:30,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:42:30,289 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-02-19 17:42:30,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:30,290 INFO L225 Difference]: With dead ends: 320 [2021-02-19 17:42:30,290 INFO L226 Difference]: Without dead ends: 278 [2021-02-19 17:42:30,291 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:42:30,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-02-19 17:42:30,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 161. [2021-02-19 17:42:30,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 3.01875) internal successors, (483), 160 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:30,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 483 transitions. [2021-02-19 17:42:30,294 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 483 transitions. Word has length 15 [2021-02-19 17:42:30,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:30,294 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 483 transitions. [2021-02-19 17:42:30,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:30,294 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 483 transitions. [2021-02-19 17:42:30,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:42:30,295 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:30,295 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:30,507 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:30,507 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:30,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:30,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1421781505, now seen corresponding path program 6 times [2021-02-19 17:42:30,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:30,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220532192] [2021-02-19 17:42:30,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:30,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:30,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:30,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220532192] [2021-02-19 17:42:30,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449591788] [2021-02-19 17:42:30,537 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:30,554 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 17:42:30,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:30,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:42:30,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:30,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:30,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:30,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-02-19 17:42:30,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224201371] [2021-02-19 17:42:30,601 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:42:30,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:30,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:42:30,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:42:30,601 INFO L87 Difference]: Start difference. First operand 161 states and 483 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:30,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:30,713 INFO L93 Difference]: Finished difference Result 259 states and 754 transitions. [2021-02-19 17:42:30,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:42:30,713 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-02-19 17:42:30,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:30,714 INFO L225 Difference]: With dead ends: 259 [2021-02-19 17:42:30,714 INFO L226 Difference]: Without dead ends: 250 [2021-02-19 17:42:30,714 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:42:30,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-02-19 17:42:30,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 166. [2021-02-19 17:42:30,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 3.036363636363636) internal successors, (501), 165 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:30,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 501 transitions. [2021-02-19 17:42:30,718 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 501 transitions. Word has length 15 [2021-02-19 17:42:30,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:30,718 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 501 transitions. [2021-02-19 17:42:30,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:30,718 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 501 transitions. [2021-02-19 17:42:30,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:42:30,719 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:30,719 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:30,919 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-02-19 17:42:30,919 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:30,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:30,919 INFO L82 PathProgramCache]: Analyzing trace with hash 4819193, now seen corresponding path program 7 times [2021-02-19 17:42:30,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:30,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625518684] [2021-02-19 17:42:30,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:30,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:30,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:30,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625518684] [2021-02-19 17:42:30,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212444329] [2021-02-19 17:42:30,951 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:30,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:30,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:42:30,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:31,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:31,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:31,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-02-19 17:42:31,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59299316] [2021-02-19 17:42:31,050 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:42:31,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:31,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:42:31,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:42:31,050 INFO L87 Difference]: Start difference. First operand 166 states and 501 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:31,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:31,133 INFO L93 Difference]: Finished difference Result 254 states and 729 transitions. [2021-02-19 17:42:31,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:42:31,134 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-02-19 17:42:31,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:31,135 INFO L225 Difference]: With dead ends: 254 [2021-02-19 17:42:31,135 INFO L226 Difference]: Without dead ends: 245 [2021-02-19 17:42:31,135 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:42:31,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-02-19 17:42:31,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 168. [2021-02-19 17:42:31,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 3.0479041916167664) internal successors, (509), 167 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:31,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 509 transitions. [2021-02-19 17:42:31,138 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 509 transitions. Word has length 15 [2021-02-19 17:42:31,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:31,138 INFO L480 AbstractCegarLoop]: Abstraction has 168 states and 509 transitions. [2021-02-19 17:42:31,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:31,138 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 509 transitions. [2021-02-19 17:42:31,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:42:31,139 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:31,139 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:31,353 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-02-19 17:42:31,353 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:31,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:31,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1366375299, now seen corresponding path program 8 times [2021-02-19 17:42:31,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:31,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912096339] [2021-02-19 17:42:31,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:31,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:31,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:31,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912096339] [2021-02-19 17:42:31,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036854501] [2021-02-19 17:42:31,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:31,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:42:31,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:31,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:42:31,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:31,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:31,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:31,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-02-19 17:42:31,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683430227] [2021-02-19 17:42:31,476 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:42:31,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:31,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:42:31,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:42:31,477 INFO L87 Difference]: Start difference. First operand 168 states and 509 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:31,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:31,584 INFO L93 Difference]: Finished difference Result 228 states and 663 transitions. [2021-02-19 17:42:31,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:42:31,584 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-02-19 17:42:31,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:31,585 INFO L225 Difference]: With dead ends: 228 [2021-02-19 17:42:31,585 INFO L226 Difference]: Without dead ends: 217 [2021-02-19 17:42:31,585 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:42:31,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-02-19 17:42:31,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 166. [2021-02-19 17:42:31,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 3.0484848484848484) internal successors, (503), 165 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:31,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 503 transitions. [2021-02-19 17:42:31,596 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 503 transitions. Word has length 15 [2021-02-19 17:42:31,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:31,597 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 503 transitions. [2021-02-19 17:42:31,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:31,597 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 503 transitions. [2021-02-19 17:42:31,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:42:31,598 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:31,598 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:31,810 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:31,810 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:31,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:31,810 INFO L82 PathProgramCache]: Analyzing trace with hash 2044994303, now seen corresponding path program 9 times [2021-02-19 17:42:31,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:31,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594188956] [2021-02-19 17:42:31,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:31,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:31,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:31,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594188956] [2021-02-19 17:42:31,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107351940] [2021-02-19 17:42:31,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:31,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 17:42:31,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:31,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:42:31,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:31,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:31,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:31,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 17:42:31,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198709903] [2021-02-19 17:42:31,936 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:42:31,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:31,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:42:31,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:42:31,937 INFO L87 Difference]: Start difference. First operand 166 states and 503 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 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) [2021-02-19 17:42:32,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:32,037 INFO L93 Difference]: Finished difference Result 254 states and 739 transitions. [2021-02-19 17:42:32,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:42:32,038 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 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 15 [2021-02-19 17:42:32,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:32,039 INFO L225 Difference]: With dead ends: 254 [2021-02-19 17:42:32,039 INFO L226 Difference]: Without dead ends: 243 [2021-02-19 17:42:32,039 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:42:32,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-02-19 17:42:32,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 165. [2021-02-19 17:42:32,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 3.042682926829268) internal successors, (499), 164 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:32,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 499 transitions. [2021-02-19 17:42:32,042 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 499 transitions. Word has length 15 [2021-02-19 17:42:32,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:32,042 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 499 transitions. [2021-02-19 17:42:32,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 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) [2021-02-19 17:42:32,042 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 499 transitions. [2021-02-19 17:42:32,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:42:32,043 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:32,043 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:32,258 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-02-19 17:42:32,258 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:32,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:32,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1908843325, now seen corresponding path program 4 times [2021-02-19 17:42:32,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:32,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320838819] [2021-02-19 17:42:32,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:32,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:32,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:32,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320838819] [2021-02-19 17:42:32,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73124203] [2021-02-19 17:42:32,294 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:32,313 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:42:32,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:32,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:42:32,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:32,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:32,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:32,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-02-19 17:42:32,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321280376] [2021-02-19 17:42:32,360 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:42:32,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:32,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:42:32,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:42:32,361 INFO L87 Difference]: Start difference. First operand 165 states and 499 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:32,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:32,422 INFO L93 Difference]: Finished difference Result 216 states and 628 transitions. [2021-02-19 17:42:32,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 17:42:32,422 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-02-19 17:42:32,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:32,423 INFO L225 Difference]: With dead ends: 216 [2021-02-19 17:42:32,423 INFO L226 Difference]: Without dead ends: 194 [2021-02-19 17:42:32,423 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:42:32,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-02-19 17:42:32,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 173. [2021-02-19 17:42:32,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.994186046511628) internal successors, (515), 172 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:32,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 515 transitions. [2021-02-19 17:42:32,426 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 515 transitions. Word has length 15 [2021-02-19 17:42:32,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:32,426 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 515 transitions. [2021-02-19 17:42:32,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:32,426 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 515 transitions. [2021-02-19 17:42:32,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:42:32,426 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:32,427 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:32,637 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:32,638 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:32,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:32,638 INFO L82 PathProgramCache]: Analyzing trace with hash -838645005, now seen corresponding path program 10 times [2021-02-19 17:42:32,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:32,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887270674] [2021-02-19 17:42:32,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:32,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:32,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:32,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887270674] [2021-02-19 17:42:32,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701179545] [2021-02-19 17:42:32,673 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 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 [2021-02-19 17:42:32,708 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:42:32,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:32,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:42:32,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:32,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:32,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:32,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-02-19 17:42:32,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775737783] [2021-02-19 17:42:32,770 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:42:32,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:32,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:42:32,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:42:32,770 INFO L87 Difference]: Start difference. First operand 173 states and 515 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:32,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:32,872 INFO L93 Difference]: Finished difference Result 216 states and 583 transitions. [2021-02-19 17:42:32,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:42:32,872 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-02-19 17:42:32,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:32,873 INFO L225 Difference]: With dead ends: 216 [2021-02-19 17:42:32,873 INFO L226 Difference]: Without dead ends: 200 [2021-02-19 17:42:32,873 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:42:32,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-02-19 17:42:32,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 166. [2021-02-19 17:42:32,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 3.0242424242424244) internal successors, (499), 165 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:32,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 499 transitions. [2021-02-19 17:42:32,876 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 499 transitions. Word has length 15 [2021-02-19 17:42:32,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:32,876 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 499 transitions. [2021-02-19 17:42:32,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:32,876 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 499 transitions. [2021-02-19 17:42:32,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:42:32,877 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:32,877 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:33,091 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:33,091 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:33,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:33,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1450061279, now seen corresponding path program 5 times [2021-02-19 17:42:33,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:33,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539795512] [2021-02-19 17:42:33,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:33,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:33,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:33,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539795512] [2021-02-19 17:42:33,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724098314] [2021-02-19 17:42:33,118 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 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 [2021-02-19 17:42:33,139 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:42:33,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:33,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:42:33,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:33,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:33,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:33,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-02-19 17:42:33,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964750754] [2021-02-19 17:42:33,193 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:42:33,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:33,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:42:33,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:42:33,193 INFO L87 Difference]: Start difference. First operand 166 states and 499 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:33,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:33,403 INFO L93 Difference]: Finished difference Result 228 states and 640 transitions. [2021-02-19 17:42:33,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:42:33,403 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-02-19 17:42:33,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:33,404 INFO L225 Difference]: With dead ends: 228 [2021-02-19 17:42:33,404 INFO L226 Difference]: Without dead ends: 199 [2021-02-19 17:42:33,404 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:42:33,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-02-19 17:42:33,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 160. [2021-02-19 17:42:33,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.9874213836477987) internal successors, (475), 159 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:33,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 475 transitions. [2021-02-19 17:42:33,407 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 475 transitions. Word has length 15 [2021-02-19 17:42:33,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:33,407 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 475 transitions. [2021-02-19 17:42:33,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:33,408 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 475 transitions. [2021-02-19 17:42:33,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:42:33,408 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:33,408 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:33,615 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-02-19 17:42:33,615 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:33,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:33,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1744915545, now seen corresponding path program 9 times [2021-02-19 17:42:33,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:33,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179480103] [2021-02-19 17:42:33,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:33,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:33,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:33,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179480103] [2021-02-19 17:42:33,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956662780] [2021-02-19 17:42:33,649 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 [2021-02-19 17:42:33,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 17:42:33,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:33,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:42:33,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:33,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:33,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:33,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-02-19 17:42:33,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560082922] [2021-02-19 17:42:33,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:42:33,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:33,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:42:33,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:42:33,723 INFO L87 Difference]: Start difference. First operand 160 states and 475 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:34,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:34,105 INFO L93 Difference]: Finished difference Result 316 states and 800 transitions. [2021-02-19 17:42:34,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:42:34,105 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-02-19 17:42:34,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:34,106 INFO L225 Difference]: With dead ends: 316 [2021-02-19 17:42:34,106 INFO L226 Difference]: Without dead ends: 266 [2021-02-19 17:42:34,107 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:42:34,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-02-19 17:42:34,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 160. [2021-02-19 17:42:34,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.9685534591194966) internal successors, (472), 159 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:34,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 472 transitions. [2021-02-19 17:42:34,112 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 472 transitions. Word has length 15 [2021-02-19 17:42:34,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:34,112 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 472 transitions. [2021-02-19 17:42:34,112 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:34,112 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 472 transitions. [2021-02-19 17:42:34,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:42:34,112 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:34,112 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:34,321 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:34,322 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:34,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:34,322 INFO L82 PathProgramCache]: Analyzing trace with hash -260491789, now seen corresponding path program 11 times [2021-02-19 17:42:34,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:34,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335890289] [2021-02-19 17:42:34,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:34,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:34,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:34,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335890289] [2021-02-19 17:42:34,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325775292] [2021-02-19 17:42:34,359 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 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 [2021-02-19 17:42:34,376 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:42:34,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:34,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:42:34,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:34,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:34,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:34,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-02-19 17:42:34,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849448528] [2021-02-19 17:42:34,432 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:42:34,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:34,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:42:34,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:42:34,432 INFO L87 Difference]: Start difference. First operand 160 states and 472 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:34,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:34,687 INFO L93 Difference]: Finished difference Result 272 states and 727 transitions. [2021-02-19 17:42:34,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:42:34,688 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-02-19 17:42:34,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:34,689 INFO L225 Difference]: With dead ends: 272 [2021-02-19 17:42:34,689 INFO L226 Difference]: Without dead ends: 246 [2021-02-19 17:42:34,689 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:42:34,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-02-19 17:42:34,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 166. [2021-02-19 17:42:34,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 3.0303030303030303) internal successors, (500), 165 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:34,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 500 transitions. [2021-02-19 17:42:34,692 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 500 transitions. Word has length 15 [2021-02-19 17:42:34,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:34,692 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 500 transitions. [2021-02-19 17:42:34,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:34,692 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 500 transitions. [2021-02-19 17:42:34,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:42:34,692 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:34,692 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:34,901 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-02-19 17:42:34,902 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:34,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:34,902 INFO L82 PathProgramCache]: Analyzing trace with hash 738121897, now seen corresponding path program 6 times [2021-02-19 17:42:34,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:34,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714376384] [2021-02-19 17:42:34,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:34,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:34,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:34,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714376384] [2021-02-19 17:42:34,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016821999] [2021-02-19 17:42:34,923 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 17:42:34,940 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 17:42:34,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:34,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:42:34,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:34,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:34,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:34,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-02-19 17:42:34,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489847667] [2021-02-19 17:42:34,977 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:42:34,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:34,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:42:34,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:42:34,977 INFO L87 Difference]: Start difference. First operand 166 states and 500 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:35,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:35,041 INFO L93 Difference]: Finished difference Result 202 states and 580 transitions. [2021-02-19 17:42:35,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 17:42:35,042 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-02-19 17:42:35,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:35,042 INFO L225 Difference]: With dead ends: 202 [2021-02-19 17:42:35,042 INFO L226 Difference]: Without dead ends: 184 [2021-02-19 17:42:35,043 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:42:35,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-02-19 17:42:35,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 150. [2021-02-19 17:42:35,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 3.0067114093959733) internal successors, (448), 149 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) [2021-02-19 17:42:35,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 448 transitions. [2021-02-19 17:42:35,045 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 448 transitions. Word has length 15 [2021-02-19 17:42:35,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:35,045 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 448 transitions. [2021-02-19 17:42:35,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:35,045 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 448 transitions. [2021-02-19 17:42:35,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:42:35,046 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:35,046 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:35,257 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-02-19 17:42:35,258 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:35,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:35,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1352149181, now seen corresponding path program 10 times [2021-02-19 17:42:35,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:35,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647900389] [2021-02-19 17:42:35,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:35,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:35,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:35,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647900389] [2021-02-19 17:42:35,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545070986] [2021-02-19 17:42:35,299 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:35,333 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:42:35,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:35,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:42:35,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:35,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:35,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:35,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-02-19 17:42:35,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920552230] [2021-02-19 17:42:35,406 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:42:35,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:35,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:42:35,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:42:35,406 INFO L87 Difference]: Start difference. First operand 150 states and 448 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:35,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:35,513 INFO L93 Difference]: Finished difference Result 183 states and 496 transitions. [2021-02-19 17:42:35,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:42:35,513 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-02-19 17:42:35,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:35,514 INFO L225 Difference]: With dead ends: 183 [2021-02-19 17:42:35,514 INFO L226 Difference]: Without dead ends: 174 [2021-02-19 17:42:35,514 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:42:35,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-02-19 17:42:35,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 147. [2021-02-19 17:42:35,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 3.0342465753424657) internal successors, (443), 146 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:35,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 443 transitions. [2021-02-19 17:42:35,517 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 443 transitions. Word has length 15 [2021-02-19 17:42:35,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:35,517 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 443 transitions. [2021-02-19 17:42:35,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:35,517 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 443 transitions. [2021-02-19 17:42:35,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:42:35,517 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:35,517 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:35,729 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-02-19 17:42:35,730 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:35,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:35,730 INFO L82 PathProgramCache]: Analyzing trace with hash -886595273, now seen corresponding path program 11 times [2021-02-19 17:42:35,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:35,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908369445] [2021-02-19 17:42:35,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:35,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:35,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:35,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908369445] [2021-02-19 17:42:35,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745768429] [2021-02-19 17:42:35,765 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:35,802 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:42:35,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:35,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:42:35,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:35,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:35,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:35,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-02-19 17:42:35,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120436965] [2021-02-19 17:42:35,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:42:35,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:35,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:42:35,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:42:35,850 INFO L87 Difference]: Start difference. First operand 147 states and 443 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:35,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:35,953 INFO L93 Difference]: Finished difference Result 174 states and 486 transitions. [2021-02-19 17:42:35,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:42:35,953 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-02-19 17:42:35,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:35,954 INFO L225 Difference]: With dead ends: 174 [2021-02-19 17:42:35,954 INFO L226 Difference]: Without dead ends: 159 [2021-02-19 17:42:35,954 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:42:35,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-02-19 17:42:35,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 145. [2021-02-19 17:42:35,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 3.048611111111111) internal successors, (439), 144 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:35,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 439 transitions. [2021-02-19 17:42:35,956 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 439 transitions. Word has length 15 [2021-02-19 17:42:35,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:35,956 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 439 transitions. [2021-02-19 17:42:35,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:35,956 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 439 transitions. [2021-02-19 17:42:35,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:42:35,957 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:35,957 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:36,157 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-02-19 17:42:36,157 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:36,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:36,157 INFO L82 PathProgramCache]: Analyzing trace with hash 981607865, now seen corresponding path program 12 times [2021-02-19 17:42:36,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:36,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057562672] [2021-02-19 17:42:36,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:36,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:36,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:36,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057562672] [2021-02-19 17:42:36,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787389283] [2021-02-19 17:42:36,194 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 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 [2021-02-19 17:42:36,212 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 17:42:36,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:36,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:42:36,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:36,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:36,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:36,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-02-19 17:42:36,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908267807] [2021-02-19 17:42:36,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:42:36,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:36,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:42:36,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:42:36,276 INFO L87 Difference]: Start difference. First operand 145 states and 439 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:36,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:36,572 INFO L93 Difference]: Finished difference Result 252 states and 658 transitions. [2021-02-19 17:42:36,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:42:36,572 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-02-19 17:42:36,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:36,573 INFO L225 Difference]: With dead ends: 252 [2021-02-19 17:42:36,573 INFO L226 Difference]: Without dead ends: 220 [2021-02-19 17:42:36,573 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:42:36,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-02-19 17:42:36,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 141. [2021-02-19 17:42:36,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 3.007142857142857) internal successors, (421), 140 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:36,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 421 transitions. [2021-02-19 17:42:36,576 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 421 transitions. Word has length 15 [2021-02-19 17:42:36,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:36,576 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 421 transitions. [2021-02-19 17:42:36,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:36,576 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 421 transitions. [2021-02-19 17:42:36,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:42:36,576 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:36,576 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:36,778 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-02-19 17:42:36,778 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:36,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:36,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1341646077, now seen corresponding path program 13 times [2021-02-19 17:42:36,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:36,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690837830] [2021-02-19 17:42:36,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:36,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:36,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:36,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690837830] [2021-02-19 17:42:36,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227591081] [2021-02-19 17:42:36,829 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:42:36,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:36,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:42:36,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:36,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:36,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:36,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 17:42:36,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688534414] [2021-02-19 17:42:36,943 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:42:36,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:36,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:42:36,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:42:36,944 INFO L87 Difference]: Start difference. First operand 141 states and 421 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:37,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:37,029 INFO L93 Difference]: Finished difference Result 184 states and 490 transitions. [2021-02-19 17:42:37,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:42:37,030 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-02-19 17:42:37,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:37,030 INFO L225 Difference]: With dead ends: 184 [2021-02-19 17:42:37,030 INFO L226 Difference]: Without dead ends: 177 [2021-02-19 17:42:37,030 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:42:37,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-02-19 17:42:37,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 141. [2021-02-19 17:42:37,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.992857142857143) internal successors, (419), 140 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) [2021-02-19 17:42:37,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 419 transitions. [2021-02-19 17:42:37,036 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 419 transitions. Word has length 15 [2021-02-19 17:42:37,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:37,036 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 419 transitions. [2021-02-19 17:42:37,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:37,036 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 419 transitions. [2021-02-19 17:42:37,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:42:37,036 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:37,036 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:37,249 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:37,250 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:37,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:37,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1876875879, now seen corresponding path program 14 times [2021-02-19 17:42:37,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:37,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529990499] [2021-02-19 17:42:37,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:37,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:37,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:37,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529990499] [2021-02-19 17:42:37,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409031728] [2021-02-19 17:42:37,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:42:37,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:42:37,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:37,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:42:37,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:37,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:37,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:37,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-02-19 17:42:37,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040709447] [2021-02-19 17:42:37,367 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:42:37,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:37,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:42:37,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:42:37,368 INFO L87 Difference]: Start difference. First operand 141 states and 419 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:37,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:37,459 INFO L93 Difference]: Finished difference Result 167 states and 458 transitions. [2021-02-19 17:42:37,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:42:37,460 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-02-19 17:42:37,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:37,460 INFO L225 Difference]: With dead ends: 167 [2021-02-19 17:42:37,460 INFO L226 Difference]: Without dead ends: 158 [2021-02-19 17:42:37,461 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:42:37,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-02-19 17:42:37,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 140. [2021-02-19 17:42:37,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.985611510791367) internal successors, (415), 139 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:37,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 415 transitions. [2021-02-19 17:42:37,463 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 415 transitions. Word has length 15 [2021-02-19 17:42:37,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:37,463 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 415 transitions. [2021-02-19 17:42:37,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:37,463 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 415 transitions. [2021-02-19 17:42:37,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:42:37,463 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:37,463 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:37,669 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-02-19 17:42:37,670 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:37,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:37,670 INFO L82 PathProgramCache]: Analyzing trace with hash 647835127, now seen corresponding path program 15 times [2021-02-19 17:42:37,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:37,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028314431] [2021-02-19 17:42:37,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:37,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:37,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:37,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028314431] [2021-02-19 17:42:37,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802429186] [2021-02-19 17:42:37,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:37,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 17:42:37,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:37,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:42:37,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:37,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:37,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:37,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-02-19 17:42:37,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164143816] [2021-02-19 17:42:37,781 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:42:37,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:37,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:42:37,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:42:37,782 INFO L87 Difference]: Start difference. First operand 140 states and 415 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:38,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:38,030 INFO L93 Difference]: Finished difference Result 245 states and 632 transitions. [2021-02-19 17:42:38,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:42:38,031 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-02-19 17:42:38,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:38,031 INFO L225 Difference]: With dead ends: 245 [2021-02-19 17:42:38,031 INFO L226 Difference]: Without dead ends: 208 [2021-02-19 17:42:38,032 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:42:38,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-02-19 17:42:38,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 141. [2021-02-19 17:42:38,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.9785714285714286) internal successors, (417), 140 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:38,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 417 transitions. [2021-02-19 17:42:38,034 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 417 transitions. Word has length 15 [2021-02-19 17:42:38,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:38,034 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 417 transitions. [2021-02-19 17:42:38,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:38,034 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 417 transitions. [2021-02-19 17:42:38,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:42:38,034 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:38,035 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:38,235 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable141 [2021-02-19 17:42:38,235 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:38,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:38,235 INFO L82 PathProgramCache]: Analyzing trace with hash 716296883, now seen corresponding path program 12 times [2021-02-19 17:42:38,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:38,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074757127] [2021-02-19 17:42:38,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:38,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:38,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:38,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074757127] [2021-02-19 17:42:38,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979229816] [2021-02-19 17:42:38,268 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) [2021-02-19 17:42:38,299 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 17:42:38,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:38,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:42:38,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:38,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:38,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:38,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-02-19 17:42:38,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391513456] [2021-02-19 17:42:38,371 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:42:38,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:38,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:42:38,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:42:38,371 INFO L87 Difference]: Start difference. First operand 141 states and 417 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:38,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:38,472 INFO L93 Difference]: Finished difference Result 180 states and 502 transitions. [2021-02-19 17:42:38,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:42:38,472 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-02-19 17:42:38,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:38,473 INFO L225 Difference]: With dead ends: 180 [2021-02-19 17:42:38,473 INFO L226 Difference]: Without dead ends: 169 [2021-02-19 17:42:38,473 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:42:38,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-02-19 17:42:38,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 142. [2021-02-19 17:42:38,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.978723404255319) internal successors, (420), 141 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:38,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 420 transitions. [2021-02-19 17:42:38,475 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 420 transitions. Word has length 15 [2021-02-19 17:42:38,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:38,475 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 420 transitions. [2021-02-19 17:42:38,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:38,475 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 420 transitions. [2021-02-19 17:42:38,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:42:38,476 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:38,476 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:38,685 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-02-19 17:42:38,686 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:38,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:38,686 INFO L82 PathProgramCache]: Analyzing trace with hash 209950617, now seen corresponding path program 13 times [2021-02-19 17:42:38,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:38,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573358817] [2021-02-19 17:42:38,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:38,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:38,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:38,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573358817] [2021-02-19 17:42:38,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110974328] [2021-02-19 17:42:38,721 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 [2021-02-19 17:42:38,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:38,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:42:38,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:38,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:38,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:38,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-02-19 17:42:38,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915436060] [2021-02-19 17:42:38,798 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:42:38,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:38,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:42:38,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:42:38,798 INFO L87 Difference]: Start difference. First operand 142 states and 420 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:38,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:38,877 INFO L93 Difference]: Finished difference Result 196 states and 530 transitions. [2021-02-19 17:42:38,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:42:38,877 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-02-19 17:42:38,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:38,878 INFO L225 Difference]: With dead ends: 196 [2021-02-19 17:42:38,878 INFO L226 Difference]: Without dead ends: 185 [2021-02-19 17:42:38,878 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:42:38,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-02-19 17:42:38,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 141. [2021-02-19 17:42:38,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.9785714285714286) internal successors, (417), 140 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:38,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 417 transitions. [2021-02-19 17:42:38,880 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 417 transitions. Word has length 15 [2021-02-19 17:42:38,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:38,880 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 417 transitions. [2021-02-19 17:42:38,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:38,880 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 417 transitions. [2021-02-19 17:42:38,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:42:38,881 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:38,881 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:39,093 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-02-19 17:42:39,094 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:39,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:39,094 INFO L82 PathProgramCache]: Analyzing trace with hash 524209249, now seen corresponding path program 16 times [2021-02-19 17:42:39,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:39,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998945084] [2021-02-19 17:42:39,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:39,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:39,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:39,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998945084] [2021-02-19 17:42:39,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226216658] [2021-02-19 17:42:39,128 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:42:39,160 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:42:39,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:39,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:42:39,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:39,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:39,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:39,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-02-19 17:42:39,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346881794] [2021-02-19 17:42:39,212 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:42:39,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:39,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:42:39,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:42:39,212 INFO L87 Difference]: Start difference. First operand 141 states and 417 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:39,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:39,321 INFO L93 Difference]: Finished difference Result 183 states and 482 transitions. [2021-02-19 17:42:39,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:42:39,321 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-02-19 17:42:39,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:39,321 INFO L225 Difference]: With dead ends: 183 [2021-02-19 17:42:39,322 INFO L226 Difference]: Without dead ends: 175 [2021-02-19 17:42:39,322 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:42:39,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-02-19 17:42:39,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 140. [2021-02-19 17:42:39,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.9784172661870505) internal successors, (414), 139 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:39,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 414 transitions. [2021-02-19 17:42:39,324 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 414 transitions. Word has length 15 [2021-02-19 17:42:39,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:39,324 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 414 transitions. [2021-02-19 17:42:39,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:39,324 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 414 transitions. [2021-02-19 17:42:39,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:42:39,324 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:39,324 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:39,530 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:39,530 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:39,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:39,530 INFO L82 PathProgramCache]: Analyzing trace with hash 22578675, now seen corresponding path program 17 times [2021-02-19 17:42:39,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:39,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582612613] [2021-02-19 17:42:39,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:39,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:39,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:39,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582612613] [2021-02-19 17:42:39,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104675447] [2021-02-19 17:42:39,555 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 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 [2021-02-19 17:42:39,573 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:42:39,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:39,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:42:39,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:39,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:39,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:39,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-02-19 17:42:39,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371811996] [2021-02-19 17:42:39,612 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:42:39,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:39,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:42:39,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:42:39,612 INFO L87 Difference]: Start difference. First operand 140 states and 414 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:39,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:39,687 INFO L93 Difference]: Finished difference Result 181 states and 490 transitions. [2021-02-19 17:42:39,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 17:42:39,687 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-02-19 17:42:39,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:39,688 INFO L225 Difference]: With dead ends: 181 [2021-02-19 17:42:39,688 INFO L226 Difference]: Without dead ends: 157 [2021-02-19 17:42:39,688 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:42:39,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-02-19 17:42:39,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 137. [2021-02-19 17:42:39,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.9558823529411766) internal successors, (402), 136 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:39,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 402 transitions. [2021-02-19 17:42:39,690 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 402 transitions. Word has length 15 [2021-02-19 17:42:39,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:39,690 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 402 transitions. [2021-02-19 17:42:39,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:39,690 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 402 transitions. [2021-02-19 17:42:39,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:42:39,690 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:39,690 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:39,905 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-02-19 17:42:39,906 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:39,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:39,906 INFO L82 PathProgramCache]: Analyzing trace with hash 212576393, now seen corresponding path program 14 times [2021-02-19 17:42:39,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:39,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470566983] [2021-02-19 17:42:39,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:39,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:39,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:39,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470566983] [2021-02-19 17:42:39,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702837457] [2021-02-19 17:42:39,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:39,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:42:39,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:39,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:42:39,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:39,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:39,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:39,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-02-19 17:42:39,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227629989] [2021-02-19 17:42:39,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:42:39,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:39,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:42:39,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:42:39,999 INFO L87 Difference]: Start difference. First operand 137 states and 402 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:40,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:40,104 INFO L93 Difference]: Finished difference Result 184 states and 512 transitions. [2021-02-19 17:42:40,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:42:40,104 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-02-19 17:42:40,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:40,105 INFO L225 Difference]: With dead ends: 184 [2021-02-19 17:42:40,105 INFO L226 Difference]: Without dead ends: 173 [2021-02-19 17:42:40,105 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:42:40,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-02-19 17:42:40,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 129. [2021-02-19 17:42:40,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.96875) internal successors, (380), 128 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:40,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 380 transitions. [2021-02-19 17:42:40,107 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 380 transitions. Word has length 15 [2021-02-19 17:42:40,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:40,107 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 380 transitions. [2021-02-19 17:42:40,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:40,107 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 380 transitions. [2021-02-19 17:42:40,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:42:40,108 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:40,108 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:40,308 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:40,308 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:40,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:40,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1153279275, now seen corresponding path program 1 times [2021-02-19 17:42:40,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:40,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417907713] [2021-02-19 17:42:40,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:40,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:40,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:42:40,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417907713] [2021-02-19 17:42:40,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852862691] [2021-02-19 17:42:40,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-02-19 17:42:40,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:40,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:42:40,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:40,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:42:40,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:40,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-02-19 17:42:40,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283398993] [2021-02-19 17:42:40,397 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:42:40,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:40,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:42:40,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:42:40,399 INFO L87 Difference]: Start difference. First operand 129 states and 380 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:40,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:40,462 INFO L93 Difference]: Finished difference Result 161 states and 462 transitions. [2021-02-19 17:42:40,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 17:42:40,462 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-02-19 17:42:40,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:40,462 INFO L225 Difference]: With dead ends: 161 [2021-02-19 17:42:40,463 INFO L226 Difference]: Without dead ends: 148 [2021-02-19 17:42:40,463 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:42:40,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-02-19 17:42:40,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 112. [2021-02-19 17:42:40,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.918918918918919) internal successors, (324), 111 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:40,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 324 transitions. [2021-02-19 17:42:40,464 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 324 transitions. Word has length 16 [2021-02-19 17:42:40,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:40,465 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 324 transitions. [2021-02-19 17:42:40,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:40,465 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 324 transitions. [2021-02-19 17:42:40,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:42:40,465 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:40,465 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:40,677 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-02-19 17:42:40,678 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:40,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:40,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1376098961, now seen corresponding path program 1 times [2021-02-19 17:42:40,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:40,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127360152] [2021-02-19 17:42:40,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:40,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:40,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:40,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127360152] [2021-02-19 17:42:40,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204029269] [2021-02-19 17:42:40,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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) [2021-02-19 17:42:40,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:40,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:42:40,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:40,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:40,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:40,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-02-19 17:42:40,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186994880] [2021-02-19 17:42:40,781 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:42:40,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:40,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:42:40,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:42:40,782 INFO L87 Difference]: Start difference. First operand 112 states and 324 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:40,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:40,850 INFO L93 Difference]: Finished difference Result 190 states and 548 transitions. [2021-02-19 17:42:40,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:42:40,850 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-02-19 17:42:40,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:40,851 INFO L225 Difference]: With dead ends: 190 [2021-02-19 17:42:40,851 INFO L226 Difference]: Without dead ends: 188 [2021-02-19 17:42:40,851 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:42:40,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-02-19 17:42:40,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 118. [2021-02-19 17:42:40,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.923076923076923) internal successors, (342), 117 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:40,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 342 transitions. [2021-02-19 17:42:40,854 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 342 transitions. Word has length 16 [2021-02-19 17:42:40,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:40,854 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 342 transitions. [2021-02-19 17:42:40,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:40,854 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 342 transitions. [2021-02-19 17:42:40,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:42:40,855 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:40,855 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:41,061 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:41,062 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:41,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:41,062 INFO L82 PathProgramCache]: Analyzing trace with hash -213835789, now seen corresponding path program 2 times [2021-02-19 17:42:41,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:41,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213532006] [2021-02-19 17:42:41,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:41,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:41,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:41,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213532006] [2021-02-19 17:42:41,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606737376] [2021-02-19 17:42:41,095 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 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 [2021-02-19 17:42:41,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:42:41,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:41,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:42:41,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:41,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:41,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:41,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-02-19 17:42:41,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531654483] [2021-02-19 17:42:41,170 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:42:41,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:41,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:42:41,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:42:41,170 INFO L87 Difference]: Start difference. First operand 118 states and 342 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:41,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:41,246 INFO L93 Difference]: Finished difference Result 221 states and 621 transitions. [2021-02-19 17:42:41,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:42:41,246 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-02-19 17:42:41,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:41,247 INFO L225 Difference]: With dead ends: 221 [2021-02-19 17:42:41,247 INFO L226 Difference]: Without dead ends: 219 [2021-02-19 17:42:41,247 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:42:41,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-02-19 17:42:41,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 119. [2021-02-19 17:42:41,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.9322033898305087) internal successors, (346), 118 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:41,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 346 transitions. [2021-02-19 17:42:41,249 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 346 transitions. Word has length 16 [2021-02-19 17:42:41,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:41,249 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 346 transitions. [2021-02-19 17:42:41,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:41,249 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 346 transitions. [2021-02-19 17:42:41,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:42:41,250 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:41,250 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:41,457 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:41,458 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:41,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:41,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1481357875, now seen corresponding path program 3 times [2021-02-19 17:42:41,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:41,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324611713] [2021-02-19 17:42:41,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:41,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:41,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:42:41,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324611713] [2021-02-19 17:42:41,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190849840] [2021-02-19 17:42:41,485 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 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 [2021-02-19 17:42:41,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 17:42:41,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:41,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:42:41,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:41,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:42:41,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:41,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-02-19 17:42:41,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062509467] [2021-02-19 17:42:41,545 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:42:41,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:41,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:42:41,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:42:41,546 INFO L87 Difference]: Start difference. First operand 119 states and 346 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:41,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:41,612 INFO L93 Difference]: Finished difference Result 152 states and 424 transitions. [2021-02-19 17:42:41,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 17:42:41,613 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-02-19 17:42:41,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:41,613 INFO L225 Difference]: With dead ends: 152 [2021-02-19 17:42:41,613 INFO L226 Difference]: Without dead ends: 134 [2021-02-19 17:42:41,613 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:42:41,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-02-19 17:42:41,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 108. [2021-02-19 17:42:41,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.878504672897196) internal successors, (308), 107 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:41,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 308 transitions. [2021-02-19 17:42:41,615 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 308 transitions. Word has length 16 [2021-02-19 17:42:41,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:41,615 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 308 transitions. [2021-02-19 17:42:41,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:41,615 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 308 transitions. [2021-02-19 17:42:41,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:42:41,615 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:41,615 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:41,829 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:41,830 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:41,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:41,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1638628345, now seen corresponding path program 1 times [2021-02-19 17:42:41,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:41,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450111652] [2021-02-19 17:42:41,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:41,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:42,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:42,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450111652] [2021-02-19 17:42:42,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911155533] [2021-02-19 17:42:42,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:42,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:42,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:42:42,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:42,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:42,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:42,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:42:42,313 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:42,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:42,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:42:42,318 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:42,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:42:42,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:42,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:42,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:42:42,357 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-02-19 17:42:42,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:42,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:42:42,363 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:42,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:42:42,407 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-02-19 17:42:42,407 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:123, output treesize:111 [2021-02-19 17:42:42,713 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 55=[array_0]} [2021-02-19 17:42:42,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:42,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-02-19 17:42:42,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-02-19 17:42:42,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:42,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:42:42,729 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:42,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:42,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:42:42,735 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:42,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:42,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:42:42,742 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:42,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:42,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:42:42,754 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-02-19 17:42:42,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:42,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-02-19 17:42:42,761 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-02-19 17:42:42,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:42,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:42:42,767 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:42,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:42,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:42:42,774 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-02-19 17:42:42,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:42,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-02-19 17:42:42,783 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:42,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:42:42,790 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:43,034 WARN L202 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 99 [2021-02-19 17:42:43,035 INFO L628 ElimStorePlain]: treesize reduction 148, result has 71.4 percent of original size [2021-02-19 17:42:43,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:43,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:43,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:42:43,044 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:43,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:43,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:43,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:42:43,051 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:43,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:42:43,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:43,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:43,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:42:43,066 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:43,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:43,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:43,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-02-19 17:42:43,073 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:43,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:43,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:43,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:42:43,080 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:43,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:42:43,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:43,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:43,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-02-19 17:42:43,097 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:43,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:43,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:43,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:42:43,104 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:43,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:43,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:43,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:42:43,110 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:43,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:42:43,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:43,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:43,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-02-19 17:42:43,127 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:43,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:43,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:43,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-02-19 17:42:43,147 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:43,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:42:43,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:43,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-02-19 17:42:43,162 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:43,250 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:42:43,256 INFO L550 ElimStorePlain]: Start of recursive call 1: 10 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-02-19 17:42:43,256 INFO L247 ElimStorePlain]: Needed 22 recursive calls to eliminate 12 variables, input treesize:419, output treesize:179 [2021-02-19 17:42:43,405 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-02-19 17:42:43,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:43,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:43,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-02-19 17:42:43,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029361526] [2021-02-19 17:42:43,480 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:42:43,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:43,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:42:43,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:42:43,480 INFO L87 Difference]: Start difference. First operand 108 states and 308 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:43,854 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 85 [2021-02-19 17:42:44,217 WARN L202 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 89 [2021-02-19 17:42:44,582 WARN L202 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 117 [2021-02-19 17:42:44,939 WARN L202 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 119 [2021-02-19 17:42:45,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:45,004 INFO L93 Difference]: Finished difference Result 244 states and 689 transitions. [2021-02-19 17:42:45,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:42:45,005 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:42:45,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:45,005 INFO L225 Difference]: With dead ends: 244 [2021-02-19 17:42:45,005 INFO L226 Difference]: Without dead ends: 240 [2021-02-19 17:42:45,006 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:42:45,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-02-19 17:42:45,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 143. [2021-02-19 17:42:45,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.936619718309859) internal successors, (417), 142 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:45,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 417 transitions. [2021-02-19 17:42:45,008 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 417 transitions. Word has length 17 [2021-02-19 17:42:45,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:45,009 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 417 transitions. [2021-02-19 17:42:45,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:45,009 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 417 transitions. [2021-02-19 17:42:45,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:42:45,009 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:45,009 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:45,209 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:45,209 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:45,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:45,210 INFO L82 PathProgramCache]: Analyzing trace with hash -310438009, now seen corresponding path program 2 times [2021-02-19 17:42:45,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:45,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113728011] [2021-02-19 17:42:45,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:45,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:45,433 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:45,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113728011] [2021-02-19 17:42:45,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137207993] [2021-02-19 17:42:45,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:45,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:42:45,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:45,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:42:45,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:45,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:42:45,670 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:45,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:42:45,673 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:45,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:42:45,676 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:45,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:42:45,680 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-02-19 17:42:45,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:42:45,683 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:45,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:42:45,686 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:45,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:42:45,689 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:45,725 INFO L628 ElimStorePlain]: treesize reduction 97, result has 33.6 percent of original size [2021-02-19 17:42:45,726 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 17:42:45,726 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:179, output treesize:49 [2021-02-19 17:42:45,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-02-19 17:42:45,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:45,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-02-19 17:42:45,775 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:45,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:42:45,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:42:45,795 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-02-19 17:42:45,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:42:45,813 INFO L518 ElimStorePlain]: Eliminatee v_prenex_20 vanished before elimination [2021-02-19 17:42:45,813 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-02-19 17:42:45,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:42:45,817 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:45,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:42:45,822 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:45,843 INFO L628 ElimStorePlain]: treesize reduction 5, result has 83.9 percent of original size [2021-02-19 17:42:45,844 INFO L518 ElimStorePlain]: Eliminatee v_prenex_17 vanished before elimination [2021-02-19 17:42:45,844 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-02-19 17:42:45,844 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:102, output treesize:26 [2021-02-19 17:42:45,876 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:45,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:45,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-02-19 17:42:45,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138397884] [2021-02-19 17:42:45,876 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:42:45,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:45,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:42:45,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:42:45,877 INFO L87 Difference]: Start difference. First operand 143 states and 417 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:46,359 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2021-02-19 17:42:46,542 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 73 [2021-02-19 17:42:46,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:46,729 INFO L93 Difference]: Finished difference Result 229 states and 646 transitions. [2021-02-19 17:42:46,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:42:46,729 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:42:46,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:46,730 INFO L225 Difference]: With dead ends: 229 [2021-02-19 17:42:46,730 INFO L226 Difference]: Without dead ends: 225 [2021-02-19 17:42:46,730 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:42:46,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-02-19 17:42:46,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 148. [2021-02-19 17:42:46,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.9183673469387754) internal successors, (429), 147 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:46,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 429 transitions. [2021-02-19 17:42:46,732 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 429 transitions. Word has length 17 [2021-02-19 17:42:46,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:46,733 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 429 transitions. [2021-02-19 17:42:46,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:46,733 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 429 transitions. [2021-02-19 17:42:46,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:42:46,733 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:46,733 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:46,945 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-02-19 17:42:46,946 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:46,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:46,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1170799861, now seen corresponding path program 3 times [2021-02-19 17:42:46,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:46,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632572820] [2021-02-19 17:42:46,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:46,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:47,109 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:47,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632572820] [2021-02-19 17:42:47,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968704701] [2021-02-19 17:42:47,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:47,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:42:47,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:47,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:42:47,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:47,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-02-19 17:42:47,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:47,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:42:47,342 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:47,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:42:47,345 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:47,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-02-19 17:42:47,349 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-02-19 17:42:47,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:42:47,352 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:47,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:42:47,355 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:47,416 INFO L628 ElimStorePlain]: treesize reduction 20, result has 86.2 percent of original size [2021-02-19 17:42:47,417 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-02-19 17:42:47,417 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:167, output treesize:125 [2021-02-19 17:42:47,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:42:47,495 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 17:42:47,563 INFO L628 ElimStorePlain]: treesize reduction 46, result has 74.2 percent of original size [2021-02-19 17:42:47,563 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-02-19 17:42:47,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:42:47,566 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:47,602 INFO L628 ElimStorePlain]: treesize reduction 33, result has 71.6 percent of original size [2021-02-19 17:42:47,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:42:47,605 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:47,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17 [2021-02-19 17:42:47,608 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:47,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:42:47,610 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:47,629 INFO L628 ElimStorePlain]: treesize reduction 5, result has 83.9 percent of original size [2021-02-19 17:42:47,629 INFO L518 ElimStorePlain]: Eliminatee v_prenex_27 vanished before elimination [2021-02-19 17:42:47,629 INFO L518 ElimStorePlain]: Eliminatee v_prenex_26 vanished before elimination [2021-02-19 17:42:47,631 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-02-19 17:42:47,631 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:187, output treesize:26 [2021-02-19 17:42:47,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:47,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:47,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:42:47,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738033476] [2021-02-19 17:42:47,669 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:42:47,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:47,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:42:47,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:42:47,669 INFO L87 Difference]: Start difference. First operand 148 states and 429 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:48,149 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2021-02-19 17:42:48,378 WARN L202 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 83 [2021-02-19 17:42:48,506 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2021-02-19 17:42:48,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:48,545 INFO L93 Difference]: Finished difference Result 228 states and 644 transitions. [2021-02-19 17:42:48,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:42:48,545 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:42:48,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:48,546 INFO L225 Difference]: With dead ends: 228 [2021-02-19 17:42:48,546 INFO L226 Difference]: Without dead ends: 224 [2021-02-19 17:42:48,546 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:42:48,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-02-19 17:42:48,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 152. [2021-02-19 17:42:48,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.9072847682119205) internal successors, (439), 151 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:48,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 439 transitions. [2021-02-19 17:42:48,549 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 439 transitions. Word has length 17 [2021-02-19 17:42:48,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:48,549 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 439 transitions. [2021-02-19 17:42:48,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:48,549 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 439 transitions. [2021-02-19 17:42:48,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:42:48,549 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:48,549 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:48,761 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-02-19 17:42:48,762 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:48,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:48,762 INFO L82 PathProgramCache]: Analyzing trace with hash 227417569, now seen corresponding path program 4 times [2021-02-19 17:42:48,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:48,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405376135] [2021-02-19 17:42:48,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:48,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:48,969 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:48,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405376135] [2021-02-19 17:42:48,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429753744] [2021-02-19 17:42:48,970 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:48,990 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:42:48,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:48,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:42:48,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:49,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:49,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:49,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:42:49,201 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:49,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:49,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:42:49,206 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:49,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:42:49,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:49,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:49,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:42:49,258 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:49,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:49,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:42:49,263 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-02-19 17:42:49,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:42:49,312 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-02-19 17:42:49,312 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:159, output treesize:147 [2021-02-19 17:42:49,577 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 10=[array_0]} [2021-02-19 17:42:49,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:49,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:42:49,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 17:42:49,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:49,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-02-19 17:42:49,589 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:49,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:49,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-02-19 17:42:49,596 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-02-19 17:42:49,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:49,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:42:49,602 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:49,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:49,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:42:49,610 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-02-19 17:42:49,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:49,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:42:49,618 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:49,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:49,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:42:49,624 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:49,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:49,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:42:49,631 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:49,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:49,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:42:49,637 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:49,642 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-02-19 17:42:49,644 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 2 xjuncts. [2021-02-19 17:42:49,910 WARN L202 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 80 [2021-02-19 17:42:49,910 INFO L628 ElimStorePlain]: treesize reduction 150, result has 71.5 percent of original size [2021-02-19 17:42:49,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:49,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:49,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:42:49,917 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:49,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:49,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:49,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:42:49,923 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:49,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:42:49,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:49,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:49,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-02-19 17:42:49,938 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:49,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:49,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:49,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:42:49,943 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:49,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:49,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:49,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:42:49,950 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:49,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:42:49,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:49,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:49,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-02-19 17:42:49,964 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:49,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:49,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:49,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:42:49,969 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:49,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:49,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:49,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:42:49,974 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:49,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:49,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:49,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-02-19 17:42:49,979 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:49,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:42:49,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:49,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:49,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-02-19 17:42:49,995 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:49,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:49,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-02-19 17:42:50,000 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:50,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:42:50,123 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-02-19 17:42:50,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:42:50,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-02-19 17:42:50,128 INFO L247 ElimStorePlain]: Needed 22 recursive calls to eliminate 6 variables, input treesize:427, output treesize:197 [2021-02-19 17:42:50,298 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2021-02-19 17:42:50,402 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:50,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:50,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-02-19 17:42:50,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280620253] [2021-02-19 17:42:50,402 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:42:50,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:50,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:42:50,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:42:50,403 INFO L87 Difference]: Start difference. First operand 152 states and 439 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:51,282 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 88 [2021-02-19 17:42:51,503 WARN L202 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 89 [2021-02-19 17:42:51,702 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 97 [2021-02-19 17:42:51,928 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-02-19 17:42:52,168 WARN L202 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 84 [2021-02-19 17:42:52,383 WARN L202 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 83 [2021-02-19 17:42:52,632 WARN L202 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 82 [2021-02-19 17:42:52,980 WARN L202 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 87 [2021-02-19 17:42:53,225 WARN L202 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 90 [2021-02-19 17:42:53,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:53,290 INFO L93 Difference]: Finished difference Result 267 states and 754 transitions. [2021-02-19 17:42:53,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:42:53,291 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:42:53,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:53,292 INFO L225 Difference]: With dead ends: 267 [2021-02-19 17:42:53,292 INFO L226 Difference]: Without dead ends: 259 [2021-02-19 17:42:53,292 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=194, Invalid=798, Unknown=0, NotChecked=0, Total=992 [2021-02-19 17:42:53,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-02-19 17:42:53,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 158. [2021-02-19 17:42:53,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.910828025477707) internal successors, (457), 157 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:53,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 457 transitions. [2021-02-19 17:42:53,294 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 457 transitions. Word has length 17 [2021-02-19 17:42:53,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:53,294 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 457 transitions. [2021-02-19 17:42:53,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:53,294 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 457 transitions. [2021-02-19 17:42:53,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:42:53,295 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:53,295 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:53,509 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-02-19 17:42:53,509 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:53,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:53,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1708655439, now seen corresponding path program 5 times [2021-02-19 17:42:53,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:53,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015586658] [2021-02-19 17:42:53,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:53,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:53,644 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:53,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015586658] [2021-02-19 17:42:53,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772432209] [2021-02-19 17:42:53,644 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:42:53,677 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:42:53,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:53,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:42:53,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:53,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:53,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:53,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:42:53,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:53,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:53,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:53,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-02-19 17:42:53,892 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-02-19 17:42:53,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:53,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:53,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:42:53,899 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:53,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:53,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:42:53,903 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:53,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:42:53,985 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-02-19 17:42:53,985 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:181, output treesize:241 [2021-02-19 17:42:54,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:54,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:42:54,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:54,201 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 17:42:54,201 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:54,462 WARN L202 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 84 [2021-02-19 17:42:54,462 INFO L628 ElimStorePlain]: treesize reduction 196, result has 65.9 percent of original size [2021-02-19 17:42:54,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:54,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:42:54,469 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-02-19 17:42:54,582 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-02-19 17:42:54,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:42:54,583 INFO L518 ElimStorePlain]: Eliminatee v_prenex_42 vanished before elimination [2021-02-19 17:42:54,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:54,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-02-19 17:42:54,604 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:54,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:54,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:42:54,611 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:54,616 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 17:42:54,618 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:54,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:54,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:42:54,624 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:54,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:54,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 38 [2021-02-19 17:42:54,630 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:54,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-02-19 17:42:54,635 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:54,811 WARN L202 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 78 [2021-02-19 17:42:54,812 INFO L628 ElimStorePlain]: treesize reduction 21, result has 93.2 percent of original size [2021-02-19 17:42:54,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:54,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-02-19 17:42:54,818 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:54,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:42:54,822 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:54,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:42:54,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:42:54,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:54,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:54,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:42:54,918 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:54,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:54,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:54,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:42:54,923 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:54,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:54,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:54,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-02-19 17:42:54,929 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:54,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:54,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:54,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:42:54,934 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:54,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:54,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:42:54,939 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:55,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:42:55,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:42:55,044 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 2 xjuncts. [2021-02-19 17:42:55,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:42:55,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:55,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:55,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:42:55,130 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:55,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:55,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:42:55,135 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:55,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:42:55,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:42:55,225 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-02-19 17:42:55,225 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 12 variables, input treesize:621, output treesize:139 [2021-02-19 17:42:55,376 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:55,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:55,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:42:55,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368717378] [2021-02-19 17:42:55,377 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:42:55,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:55,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:42:55,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:42:55,377 INFO L87 Difference]: Start difference. First operand 158 states and 457 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:56,327 WARN L202 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 113 [2021-02-19 17:42:56,490 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 99 [2021-02-19 17:42:56,820 WARN L202 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2021-02-19 17:42:57,024 WARN L202 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-02-19 17:42:57,401 WARN L202 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 73 [2021-02-19 17:42:57,632 WARN L202 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 74 [2021-02-19 17:42:57,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:57,685 INFO L93 Difference]: Finished difference Result 281 states and 774 transitions. [2021-02-19 17:42:57,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:42:57,686 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:42:57,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:57,686 INFO L225 Difference]: With dead ends: 281 [2021-02-19 17:42:57,686 INFO L226 Difference]: Without dead ends: 269 [2021-02-19 17:42:57,687 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:42:57,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-02-19 17:42:57,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 161. [2021-02-19 17:42:57,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.93125) internal successors, (469), 160 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:57,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 469 transitions. [2021-02-19 17:42:57,689 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 469 transitions. Word has length 17 [2021-02-19 17:42:57,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:57,689 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 469 transitions. [2021-02-19 17:42:57,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:57,689 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 469 transitions. [2021-02-19 17:42:57,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:42:57,690 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:57,690 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:57,903 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:57,904 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:57,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:57,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1137200633, now seen corresponding path program 6 times [2021-02-19 17:42:57,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:57,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620375609] [2021-02-19 17:42:57,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:57,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:58,040 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:58,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620375609] [2021-02-19 17:42:58,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746553886] [2021-02-19 17:42:58,041 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:58,060 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:42:58,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:42:58,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:42:58,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:58,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:42:58,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:58,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:42:58,160 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:58,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:42:58,164 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-02-19 17:42:58,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:42:58,168 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:58,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:42:58,171 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:58,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:42:58,175 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:58,222 INFO L628 ElimStorePlain]: treesize reduction 15, result has 86.0 percent of original size [2021-02-19 17:42:58,222 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-02-19 17:42:58,223 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:133, output treesize:92 [2021-02-19 17:42:58,340 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 17:42:58,341 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:58,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:42:58,347 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-02-19 17:42:58,391 INFO L628 ElimStorePlain]: treesize reduction 71, result has 53.9 percent of original size [2021-02-19 17:42:58,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:42:58,395 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:58,419 INFO L628 ElimStorePlain]: treesize reduction 21, result has 66.1 percent of original size [2021-02-19 17:42:58,419 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-02-19 17:42:58,419 INFO L518 ElimStorePlain]: Eliminatee v_prenex_51 vanished before elimination [2021-02-19 17:42:58,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:42:58,422 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:42:58,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:42:58,432 INFO L518 ElimStorePlain]: Eliminatee v_prenex_46 vanished before elimination [2021-02-19 17:42:58,432 INFO L518 ElimStorePlain]: Eliminatee v_prenex_49 vanished before elimination [2021-02-19 17:42:58,432 INFO L518 ElimStorePlain]: Eliminatee v_prenex_48 vanished before elimination [2021-02-19 17:42:58,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-02-19 17:42:58,433 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:187, output treesize:26 [2021-02-19 17:42:58,467 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:58,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:42:58,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-02-19 17:42:58,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903579342] [2021-02-19 17:42:58,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:42:58,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:42:58,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:42:58,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:42:58,468 INFO L87 Difference]: Start difference. First operand 161 states and 469 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:58,899 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 64 [2021-02-19 17:42:59,144 WARN L202 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 92 [2021-02-19 17:42:59,334 WARN L202 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 76 [2021-02-19 17:42:59,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:42:59,373 INFO L93 Difference]: Finished difference Result 281 states and 779 transitions. [2021-02-19 17:42:59,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:42:59,374 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:42:59,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:42:59,374 INFO L225 Difference]: With dead ends: 281 [2021-02-19 17:42:59,374 INFO L226 Difference]: Without dead ends: 277 [2021-02-19 17:42:59,375 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:42:59,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-02-19 17:42:59,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 167. [2021-02-19 17:42:59,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.9156626506024095) internal successors, (484), 166 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:59,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 484 transitions. [2021-02-19 17:42:59,377 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 484 transitions. Word has length 17 [2021-02-19 17:42:59,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:42:59,377 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 484 transitions. [2021-02-19 17:42:59,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:42:59,377 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 484 transitions. [2021-02-19 17:42:59,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:42:59,378 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:42:59,378 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:42:59,578 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable320,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:59,578 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:42:59,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:42:59,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1272047915, now seen corresponding path program 7 times [2021-02-19 17:42:59,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:42:59,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174809614] [2021-02-19 17:42:59,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:42:59,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:59,803 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:42:59,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174809614] [2021-02-19 17:42:59,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049014895] [2021-02-19 17:42:59,803 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:42:59,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:42:59,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:42:59,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:42:59,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:59,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:42:59,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:42:59,996 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 17:42:59,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:00,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:43:00,001 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:00,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:00,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:00,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:00,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:43:00,052 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:00,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:00,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:43:00,056 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:00,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:00,105 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-02-19 17:43:00,105 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:155, output treesize:143 [2021-02-19 17:43:00,355 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 36=[array_0]} [2021-02-19 17:43:00,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:00,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:43:00,363 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 17:43:00,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:00,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-02-19 17:43:00,369 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-02-19 17:43:00,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:00,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:43:00,376 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:00,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:00,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-02-19 17:43:00,383 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:00,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:00,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:43:00,391 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:00,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:00,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:43:00,398 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:00,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:00,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-02-19 17:43:00,404 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 4 xjuncts. [2021-02-19 17:43:00,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:00,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:43:00,411 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-02-19 17:43:00,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:00,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:43:00,418 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:00,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:43:00,425 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:00,687 WARN L202 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 87 [2021-02-19 17:43:00,688 INFO L628 ElimStorePlain]: treesize reduction 148, result has 71.4 percent of original size [2021-02-19 17:43:00,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:00,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:00,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:43:00,695 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:00,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:00,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:00,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-02-19 17:43:00,701 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:00,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:00,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:00,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-02-19 17:43:00,707 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:00,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:00,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:00,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:00,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:43:00,727 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:00,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:00,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:00,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:43:00,732 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:00,740 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:00,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:00,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:00,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-02-19 17:43:00,746 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:00,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:00,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:00,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:43:00,752 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:00,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:00,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:00,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-02-19 17:43:00,758 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:00,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:00,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:00,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:00,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-02-19 17:43:00,773 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:00,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:00,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:00,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:43:00,779 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:00,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:00,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:43:00,784 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:00,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:00,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:00,895 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-02-19 17:43:00,895 INFO L247 ElimStorePlain]: Needed 22 recursive calls to eliminate 10 variables, input treesize:419, output treesize:179 [2021-02-19 17:43:01,044 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-02-19 17:43:01,115 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:01,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:01,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-02-19 17:43:01,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50463048] [2021-02-19 17:43:01,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:43:01,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:01,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:43:01,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:43:01,116 INFO L87 Difference]: Start difference. First operand 167 states and 484 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:01,693 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 87 [2021-02-19 17:43:01,896 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-02-19 17:43:02,082 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2021-02-19 17:43:02,290 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2021-02-19 17:43:02,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:02,368 INFO L93 Difference]: Finished difference Result 290 states and 824 transitions. [2021-02-19 17:43:02,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:43:02,369 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:43:02,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:02,370 INFO L225 Difference]: With dead ends: 290 [2021-02-19 17:43:02,370 INFO L226 Difference]: Without dead ends: 286 [2021-02-19 17:43:02,370 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:43:02,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-02-19 17:43:02,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 170. [2021-02-19 17:43:02,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.9171597633136095) internal successors, (493), 169 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:02,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 493 transitions. [2021-02-19 17:43:02,373 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 493 transitions. Word has length 17 [2021-02-19 17:43:02,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:02,373 INFO L480 AbstractCegarLoop]: Abstraction has 170 states and 493 transitions. [2021-02-19 17:43:02,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:02,373 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 493 transitions. [2021-02-19 17:43:02,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:43:02,373 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:02,373 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:02,587 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:43:02,587 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:02,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:02,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1541681511, now seen corresponding path program 8 times [2021-02-19 17:43:02,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:02,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343567413] [2021-02-19 17:43:02,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:02,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:02,755 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:02,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343567413] [2021-02-19 17:43:02,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029392576] [2021-02-19 17:43:02,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:43:02,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:43:02,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:02,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:43:02,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:02,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:02,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:02,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:43:02,944 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:02,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:02,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:02,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-02-19 17:43:02,949 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-02-19 17:43:02,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:02,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:02,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:43:02,959 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:02,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:02,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:43:02,964 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:03,042 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:03,050 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-02-19 17:43:03,050 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:179, output treesize:239 [2021-02-19 17:43:03,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:03,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:03,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:43:03,231 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:03,235 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 17:43:03,236 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:03,515 WARN L202 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 84 [2021-02-19 17:43:03,516 INFO L628 ElimStorePlain]: treesize reduction 202, result has 64.8 percent of original size [2021-02-19 17:43:03,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:43:03,522 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-02-19 17:43:03,638 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-02-19 17:43:03,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:03,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:03,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:03,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-02-19 17:43:03,645 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:03,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:03,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:03,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:43:03,651 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:03,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:03,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:03,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 38 [2021-02-19 17:43:03,658 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:03,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:03,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:03,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:43:03,664 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:03,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:03,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:03,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-02-19 17:43:03,674 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:03,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:03,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-02-19 17:43:03,679 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:03,857 WARN L202 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 77 [2021-02-19 17:43:03,858 INFO L628 ElimStorePlain]: treesize reduction 55, result has 83.7 percent of original size [2021-02-19 17:43:03,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:03,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:03,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:43:03,867 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:03,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:03,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-02-19 17:43:03,872 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:03,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:03,967 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:03,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:03,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:43:03,972 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:03,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:03,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:43:03,979 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:03,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:03,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:43:03,984 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:03,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:03,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-02-19 17:43:03,988 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:03,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:43:03,992 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:04,073 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:04,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:43:04,078 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 2 xjuncts. [2021-02-19 17:43:04,163 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:04,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:04,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:04,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:43:04,168 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:04,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:04,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:43:04,172 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:04,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:04,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:04,262 INFO L518 ElimStorePlain]: Eliminatee v_prenex_66 vanished before elimination [2021-02-19 17:43:04,265 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-02-19 17:43:04,265 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 12 variables, input treesize:621, output treesize:139 [2021-02-19 17:43:04,414 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:04,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:04,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:43:04,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728659438] [2021-02-19 17:43:04,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:43:04,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:04,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:43:04,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:43:04,415 INFO L87 Difference]: Start difference. First operand 170 states and 493 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:04,972 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 95 [2021-02-19 17:43:05,201 WARN L202 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 110 [2021-02-19 17:43:05,373 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 103 [2021-02-19 17:43:05,543 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-02-19 17:43:05,739 WARN L202 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 104 [2021-02-19 17:43:05,922 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-02-19 17:43:06,145 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2021-02-19 17:43:06,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:06,237 INFO L93 Difference]: Finished difference Result 295 states and 832 transitions. [2021-02-19 17:43:06,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:43:06,237 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:43:06,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:06,238 INFO L225 Difference]: With dead ends: 295 [2021-02-19 17:43:06,238 INFO L226 Difference]: Without dead ends: 287 [2021-02-19 17:43:06,238 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:43:06,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-02-19 17:43:06,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 167. [2021-02-19 17:43:06,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.9457831325301207) internal successors, (489), 166 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:06,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 489 transitions. [2021-02-19 17:43:06,241 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 489 transitions. Word has length 17 [2021-02-19 17:43:06,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:06,241 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 489 transitions. [2021-02-19 17:43:06,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:06,241 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 489 transitions. [2021-02-19 17:43:06,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:43:06,242 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:06,242 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:06,442 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable373,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:43:06,442 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:06,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:06,442 INFO L82 PathProgramCache]: Analyzing trace with hash -598492067, now seen corresponding path program 9 times [2021-02-19 17:43:06,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:06,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317465832] [2021-02-19 17:43:06,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:06,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:06,620 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:06,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317465832] [2021-02-19 17:43:06,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022502548] [2021-02-19 17:43:06,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:43:06,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:43:06,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:06,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:43:06,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:06,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:06,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:43:06,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:06,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:06,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:06,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:43:06,866 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:06,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:06,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:06,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:43:06,910 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:06,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:06,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:06,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-02-19 17:43:06,952 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-02-19 17:43:07,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:07,017 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-02-19 17:43:07,017 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:164, output treesize:224 [2021-02-19 17:43:07,255 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 73 [2021-02-19 17:43:07,351 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 78=[array_2]} [2021-02-19 17:43:07,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:07,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:43:07,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:07,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:07,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-02-19 17:43:07,369 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-02-19 17:43:07,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:07,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:43:07,376 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:07,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:07,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:43:07,383 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:07,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:07,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:43:07,390 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:07,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:07,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-02-19 17:43:07,398 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-02-19 17:43:07,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:07,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:43:07,406 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:07,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:07,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-02-19 17:43:07,414 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 4 xjuncts. [2021-02-19 17:43:07,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:07,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-02-19 17:43:07,423 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 2 xjuncts. [2021-02-19 17:43:07,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:07,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:43:07,430 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:07,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:07,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:43:07,437 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:07,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-02-19 17:43:07,445 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 2 xjuncts. [2021-02-19 17:43:07,789 WARN L202 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 116 [2021-02-19 17:43:07,789 INFO L628 ElimStorePlain]: treesize reduction 370, result has 55.3 percent of original size [2021-02-19 17:43:07,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:07,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:07,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:43:07,796 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:07,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:07,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:07,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:43:07,802 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:07,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:07,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:07,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:43:07,808 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:07,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:07,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:07,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-02-19 17:43:07,815 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:07,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:07,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:07,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-02-19 17:43:07,821 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:07,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:07,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:07,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:07,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:43:07,841 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:07,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:07,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:07,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-02-19 17:43:07,847 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:07,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:07,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:07,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:07,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-02-19 17:43:07,862 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:07,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:07,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:07,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 15 [2021-02-19 17:43:07,868 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:07,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:07,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:07,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:07,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:43:07,887 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:07,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:07,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:43:07,892 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:07,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:08,024 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-02-19 17:43:08,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:08,028 INFO L550 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-02-19 17:43:08,028 INFO L247 ElimStorePlain]: Needed 24 recursive calls to eliminate 14 variables, input treesize:625, output treesize:232 [2021-02-19 17:43:08,194 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2021-02-19 17:43:08,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:08,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:08,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:43:08,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142542324] [2021-02-19 17:43:08,301 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:43:08,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:08,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:43:08,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:43:08,301 INFO L87 Difference]: Start difference. First operand 167 states and 489 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:08,914 WARN L202 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 97 [2021-02-19 17:43:09,239 WARN L202 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 93 [2021-02-19 17:43:09,690 WARN L202 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 121 [2021-02-19 17:43:09,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:09,799 INFO L93 Difference]: Finished difference Result 314 states and 887 transitions. [2021-02-19 17:43:09,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:43:09,799 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:43:09,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:09,800 INFO L225 Difference]: With dead ends: 314 [2021-02-19 17:43:09,800 INFO L226 Difference]: Without dead ends: 310 [2021-02-19 17:43:09,800 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:43:09,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-02-19 17:43:09,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 167. [2021-02-19 17:43:09,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.963855421686747) internal successors, (492), 166 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:09,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 492 transitions. [2021-02-19 17:43:09,803 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 492 transitions. Word has length 17 [2021-02-19 17:43:09,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:09,803 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 492 transitions. [2021-02-19 17:43:09,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:09,803 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 492 transitions. [2021-02-19 17:43:09,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:43:09,804 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:09,804 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:10,004 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-02-19 17:43:10,004 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:10,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:10,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1539623295, now seen corresponding path program 10 times [2021-02-19 17:43:10,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:10,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922857690] [2021-02-19 17:43:10,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:10,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:10,205 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:10,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922857690] [2021-02-19 17:43:10,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27851729] [2021-02-19 17:43:10,205 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 17:43:10,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:43:10,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:10,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:43:10,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:10,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:10,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:10,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:43:10,525 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:10,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:10,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:43:10,530 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:10,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:10,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:10,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:10,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:43:10,598 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:10,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:10,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:43:10,603 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-02-19 17:43:10,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:10,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:10,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:10,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:43:10,669 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:10,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:10,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:43:10,673 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:10,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:10,738 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-02-19 17:43:10,738 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:187, output treesize:163 [2021-02-19 17:43:11,018 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_93, v_prenex_97, array_4, v_prenex_95, v_prenex_99], 1=[v_prenex_94, v_prenex_92, v_prenex_98, array_2, v_prenex_96]} [2021-02-19 17:43:11,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:43:11,024 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:11,214 WARN L202 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 51 [2021-02-19 17:43:11,215 INFO L628 ElimStorePlain]: treesize reduction 160, result has 52.4 percent of original size [2021-02-19 17:43:11,215 INFO L518 ElimStorePlain]: Eliminatee v_prenex_97 vanished before elimination [2021-02-19 17:43:11,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:43:11,219 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:11,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:43:11,225 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:11,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:43:11,229 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:11,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-02-19 17:43:11,233 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:11,297 INFO L628 ElimStorePlain]: treesize reduction 33, result has 77.7 percent of original size [2021-02-19 17:43:11,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:43:11,300 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:11,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:11,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-02-19 17:43:11,333 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:11,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:11,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:11,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:43:11,364 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:11,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:11,392 INFO L518 ElimStorePlain]: Eliminatee v_prenex_92 vanished before elimination [2021-02-19 17:43:11,392 INFO L518 ElimStorePlain]: Eliminatee v_prenex_98 vanished before elimination [2021-02-19 17:43:11,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:11,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:11,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:43:11,396 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:11,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:11,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:11,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:43:11,401 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:11,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:11,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:43:11,404 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:11,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:11,430 INFO L518 ElimStorePlain]: Eliminatee v_prenex_96 vanished before elimination [2021-02-19 17:43:11,431 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 10 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-02-19 17:43:11,431 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 15 variables, input treesize:343, output treesize:31 [2021-02-19 17:43:11,477 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:11,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:11,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-02-19 17:43:11,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844903151] [2021-02-19 17:43:11,477 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:43:11,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:11,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:43:11,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:43:11,477 INFO L87 Difference]: Start difference. First operand 167 states and 492 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:12,074 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 88 [2021-02-19 17:43:12,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:12,205 INFO L93 Difference]: Finished difference Result 255 states and 726 transitions. [2021-02-19 17:43:12,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:43:12,205 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:43:12,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:12,206 INFO L225 Difference]: With dead ends: 255 [2021-02-19 17:43:12,206 INFO L226 Difference]: Without dead ends: 251 [2021-02-19 17:43:12,206 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:43:12,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-02-19 17:43:12,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 165. [2021-02-19 17:43:12,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.9695121951219514) internal successors, (487), 164 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:12,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 487 transitions. [2021-02-19 17:43:12,209 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 487 transitions. Word has length 17 [2021-02-19 17:43:12,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:12,209 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 487 transitions. [2021-02-19 17:43:12,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:12,209 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 487 transitions. [2021-02-19 17:43:12,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:43:12,209 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:12,209 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:12,413 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable439 [2021-02-19 17:43:12,414 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:12,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:12,414 INFO L82 PathProgramCache]: Analyzing trace with hash -986642077, now seen corresponding path program 11 times [2021-02-19 17:43:12,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:12,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717603532] [2021-02-19 17:43:12,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:12,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:12,700 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:12,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717603532] [2021-02-19 17:43:12,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365696629] [2021-02-19 17:43:12,701 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:43:12,720 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:43:12,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:12,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:43:12,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:12,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:12,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:12,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:43:12,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:12,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:12,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:12,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:43:12,886 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:12,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:12,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:12,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-02-19 17:43:12,891 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-02-19 17:43:12,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:12,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:43:12,897 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:12,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:12,982 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-02-19 17:43:12,982 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:175, output treesize:235 [2021-02-19 17:43:13,438 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_109, array_4, v_prenex_112, v_prenex_104, v_prenex_106], 1=[v_prenex_108, array_2, v_prenex_111, v_prenex_103, v_prenex_105]} [2021-02-19 17:43:13,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:43:13,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:13,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-02-19 17:43:13,452 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:13,550 INFO L628 ElimStorePlain]: treesize reduction 198, result has 39.6 percent of original size [2021-02-19 17:43:13,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:43:13,554 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:13,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:13,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:43:13,587 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-02-19 17:43:13,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:13,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:43:13,624 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:13,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:13,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-02-19 17:43:13,660 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:13,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:13,691 INFO L518 ElimStorePlain]: Eliminatee v_prenex_108 vanished before elimination [2021-02-19 17:43:13,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:13,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-02-19 17:43:13,695 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:13,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:13,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:13,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:13,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:43:13,729 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:13,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:13,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:43:13,733 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:13,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:13,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:13,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:13,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:43:13,774 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:13,802 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:13,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:13,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-02-19 17:43:13,806 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:13,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:13,838 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 10 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-02-19 17:43:13,838 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 15 variables, input treesize:347, output treesize:44 [2021-02-19 17:43:13,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:13,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:13,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-02-19 17:43:13,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738704578] [2021-02-19 17:43:13,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:43:13,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:13,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:43:13,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:43:13,888 INFO L87 Difference]: Start difference. First operand 165 states and 487 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:14,585 WARN L202 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 107 [2021-02-19 17:43:15,115 WARN L202 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 127 [2021-02-19 17:43:15,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:15,353 INFO L93 Difference]: Finished difference Result 264 states and 751 transitions. [2021-02-19 17:43:15,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:43:15,353 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:43:15,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:15,354 INFO L225 Difference]: With dead ends: 264 [2021-02-19 17:43:15,354 INFO L226 Difference]: Without dead ends: 260 [2021-02-19 17:43:15,354 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:43:15,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-02-19 17:43:15,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 161. [2021-02-19 17:43:15,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.94375) internal successors, (471), 160 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:15,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 471 transitions. [2021-02-19 17:43:15,357 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 471 transitions. Word has length 17 [2021-02-19 17:43:15,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:15,357 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 471 transitions. [2021-02-19 17:43:15,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:15,357 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 471 transitions. [2021-02-19 17:43:15,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:43:15,357 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:15,357 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:15,561 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable487 [2021-02-19 17:43:15,562 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:15,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:15,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1496338753, now seen corresponding path program 12 times [2021-02-19 17:43:15,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:15,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774486439] [2021-02-19 17:43:15,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:15,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:15,765 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:15,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774486439] [2021-02-19 17:43:15,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917284172] [2021-02-19 17:43:15,765 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 17:43:15,788 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 17:43:15,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:15,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:43:15,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:16,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:16,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:16,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:43:16,153 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:16,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:16,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:43:16,158 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-02-19 17:43:16,291 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2021-02-19 17:43:16,291 INFO L628 ElimStorePlain]: treesize reduction 38, result has 82.3 percent of original size [2021-02-19 17:43:16,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:16,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:16,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:43:16,296 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:16,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:16,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:43:16,301 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:16,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:16,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:16,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:43:16,365 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:16,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:16,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 3 dim-1 vars, End of recursive call: 10 dim-0 vars, and 5 xjuncts. [2021-02-19 17:43:16,433 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 9 variables, input treesize:213, output treesize:156 [2021-02-19 17:43:16,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:16,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:16,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:43:16,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:16,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:16,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:43:16,768 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-02-19 17:43:16,895 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2021-02-19 17:43:16,896 INFO L628 ElimStorePlain]: treesize reduction 30, result has 85.2 percent of original size [2021-02-19 17:43:16,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:16,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:16,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:43:16,901 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:16,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:16,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:43:16,905 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:16,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:16,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:16,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:16,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:16,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:43:16,979 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:16,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:16,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:43:16,983 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:17,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:17,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:17,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:17,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-02-19 17:43:17,043 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:17,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:17,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:43:17,048 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:17,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:17,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:17,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:17,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-02-19 17:43:17,107 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:17,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:17,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-02-19 17:43:17,111 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:17,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:17,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:17,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:17,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:43:17,165 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:17,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:17,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-02-19 17:43:17,169 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:17,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:17,225 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-02-19 17:43:17,225 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 12 variables, input treesize:199, output treesize:31 [2021-02-19 17:43:17,268 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:17,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:17,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-02-19 17:43:17,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443163443] [2021-02-19 17:43:17,269 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:43:17,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:17,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:43:17,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:43:17,269 INFO L87 Difference]: Start difference. First operand 161 states and 471 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:17,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:17,885 INFO L93 Difference]: Finished difference Result 223 states and 624 transitions. [2021-02-19 17:43:17,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:43:17,885 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:43:17,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:17,886 INFO L225 Difference]: With dead ends: 223 [2021-02-19 17:43:17,886 INFO L226 Difference]: Without dead ends: 219 [2021-02-19 17:43:17,886 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:43:17,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-02-19 17:43:17,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 168. [2021-02-19 17:43:17,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.946107784431138) internal successors, (492), 167 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:17,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 492 transitions. [2021-02-19 17:43:17,889 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 492 transitions. Word has length 17 [2021-02-19 17:43:17,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:17,889 INFO L480 AbstractCegarLoop]: Abstraction has 168 states and 492 transitions. [2021-02-19 17:43:17,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:17,889 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 492 transitions. [2021-02-19 17:43:17,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:43:17,889 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:17,889 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:18,089 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable520 [2021-02-19 17:43:18,089 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:18,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:18,090 INFO L82 PathProgramCache]: Analyzing trace with hash 849562189, now seen corresponding path program 13 times [2021-02-19 17:43:18,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:18,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769162318] [2021-02-19 17:43:18,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:18,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:18,283 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:18,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769162318] [2021-02-19 17:43:18,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047996349] [2021-02-19 17:43:18,283 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 [2021-02-19 17:43:18,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:18,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:43:18,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:18,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:18,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:18,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:43:18,497 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:18,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:18,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:43:18,501 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:18,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:18,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:18,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:18,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:43:18,555 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-02-19 17:43:18,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:18,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:43:18,559 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:18,605 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:18,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-02-19 17:43:18,610 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:155, output treesize:143 [2021-02-19 17:43:18,846 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 36=[array_0]} [2021-02-19 17:43:18,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:18,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:43:18,853 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:18,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:18,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:43:18,859 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:18,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:18,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:43:18,865 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:18,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:18,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:43:18,871 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:18,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:18,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:43:18,877 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-02-19 17:43:18,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:18,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:43:18,883 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-02-19 17:43:18,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:18,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-02-19 17:43:18,889 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:18,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:18,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:43:18,895 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:18,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:18,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-02-19 17:43:18,902 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 4 xjuncts. [2021-02-19 17:43:18,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-02-19 17:43:18,908 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 2 xjuncts. [2021-02-19 17:43:19,174 WARN L202 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 87 [2021-02-19 17:43:19,174 INFO L628 ElimStorePlain]: treesize reduction 148, result has 71.4 percent of original size [2021-02-19 17:43:19,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:19,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:19,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:43:19,180 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:19,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:19,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:19,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:43:19,202 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:19,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:19,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:19,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:19,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:43:19,218 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:19,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:19,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:19,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-02-19 17:43:19,224 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:19,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:19,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:19,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-02-19 17:43:19,230 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:19,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:19,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:19,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:19,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-02-19 17:43:19,251 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:19,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:19,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:19,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-02-19 17:43:19,256 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:19,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:19,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:19,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:43:19,262 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:19,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:19,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:19,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-02-19 17:43:19,268 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:19,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:19,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:19,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:19,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:43:19,286 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:19,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:19,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:43:19,291 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:19,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:19,412 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-02-19 17:43:19,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:19,415 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-02-19 17:43:19,416 INFO L247 ElimStorePlain]: Needed 22 recursive calls to eliminate 10 variables, input treesize:419, output treesize:179 [2021-02-19 17:43:19,578 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-02-19 17:43:19,645 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:19,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:19,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-02-19 17:43:19,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380863013] [2021-02-19 17:43:19,645 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:43:19,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:19,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:43:19,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:43:19,646 INFO L87 Difference]: Start difference. First operand 168 states and 492 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:20,239 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 81 [2021-02-19 17:43:20,462 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-02-19 17:43:20,680 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-02-19 17:43:20,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:20,733 INFO L93 Difference]: Finished difference Result 207 states and 602 transitions. [2021-02-19 17:43:20,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:43:20,733 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:43:20,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:20,734 INFO L225 Difference]: With dead ends: 207 [2021-02-19 17:43:20,734 INFO L226 Difference]: Without dead ends: 203 [2021-02-19 17:43:20,734 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:43:20,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-02-19 17:43:20,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 171. [2021-02-19 17:43:20,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.947058823529412) internal successors, (501), 170 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:20,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 501 transitions. [2021-02-19 17:43:20,736 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 501 transitions. Word has length 17 [2021-02-19 17:43:20,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:20,736 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 501 transitions. [2021-02-19 17:43:20,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:20,737 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 501 transitions. [2021-02-19 17:43:20,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:43:20,737 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:20,737 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:20,937 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable588 [2021-02-19 17:43:20,937 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:20,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:20,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1964167237, now seen corresponding path program 14 times [2021-02-19 17:43:20,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:20,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298933743] [2021-02-19 17:43:20,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:20,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:21,131 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:21,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298933743] [2021-02-19 17:43:21,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793435844] [2021-02-19 17:43:21,131 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 [2021-02-19 17:43:21,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:43:21,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:21,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:43:21,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:21,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:21,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:21,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:43:21,330 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:21,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:21,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:21,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-02-19 17:43:21,336 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-02-19 17:43:21,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:21,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:21,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:43:21,342 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:21,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:21,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:43:21,347 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:21,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:21,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-02-19 17:43:21,454 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:199, output treesize:259 [2021-02-19 17:43:21,670 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 10=[array_2]} [2021-02-19 17:43:21,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:21,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:21,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:43:21,681 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:21,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:21,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:21,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 36 [2021-02-19 17:43:21,688 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:21,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:21,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:21,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:43:21,695 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:21,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:21,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:21,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-02-19 17:43:21,703 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:21,708 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 17:43:21,709 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:21,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:21,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:21,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 38 [2021-02-19 17:43:21,717 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:21,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:21,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:21,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:43:21,724 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:21,730 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 17:43:21,731 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:21,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:21,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:21,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:43:21,738 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:21,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:21,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:21,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:43:21,746 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 2 xjuncts. [2021-02-19 17:43:21,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:21,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:21,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:43:21,755 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 2 xjuncts. [2021-02-19 17:43:21,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:21,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:21,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-02-19 17:43:21,764 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:21,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:21,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:21,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:43:21,772 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:21,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:21,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:43:21,781 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:22,085 WARN L202 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 75 [2021-02-19 17:43:22,086 INFO L628 ElimStorePlain]: treesize reduction 207, result has 61.7 percent of original size [2021-02-19 17:43:22,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:22,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:22,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:43:22,092 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:22,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:22,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:22,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:43:22,097 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:22,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:22,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:22,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:43:22,103 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:22,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:22,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:22,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:43:22,108 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:22,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:22,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:22,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:43:22,114 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:22,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:22,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:22,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:22,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:43:22,128 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:22,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:22,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:22,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-02-19 17:43:22,134 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:22,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:22,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:22,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:43:22,139 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:22,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:22,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:22,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-02-19 17:43:22,153 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:22,267 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-02-19 17:43:22,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:22,271 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-02-19 17:43:22,271 INFO L247 ElimStorePlain]: Needed 24 recursive calls to eliminate 7 variables, input treesize:689, output treesize:139 [2021-02-19 17:43:22,428 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:22,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:22,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-02-19 17:43:22,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522325358] [2021-02-19 17:43:22,429 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:43:22,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:22,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:43:22,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:43:22,429 INFO L87 Difference]: Start difference. First operand 171 states and 501 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:22,809 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 92 [2021-02-19 17:43:22,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:22,992 INFO L93 Difference]: Finished difference Result 215 states and 613 transitions. [2021-02-19 17:43:22,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:43:22,993 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:43:22,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:22,993 INFO L225 Difference]: With dead ends: 215 [2021-02-19 17:43:22,993 INFO L226 Difference]: Without dead ends: 211 [2021-02-19 17:43:22,994 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:43:22,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-02-19 17:43:22,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 174. [2021-02-19 17:43:22,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.9653179190751446) internal successors, (513), 173 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:22,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 513 transitions. [2021-02-19 17:43:22,996 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 513 transitions. Word has length 17 [2021-02-19 17:43:22,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:22,996 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 513 transitions. [2021-02-19 17:43:22,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:22,996 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 513 transitions. [2021-02-19 17:43:22,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:43:22,996 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:22,996 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:23,197 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable621,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:43:23,197 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:23,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:23,197 INFO L82 PathProgramCache]: Analyzing trace with hash 659824043, now seen corresponding path program 15 times [2021-02-19 17:43:23,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:23,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025375355] [2021-02-19 17:43:23,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:23,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:23,390 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:23,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025375355] [2021-02-19 17:43:23,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808803583] [2021-02-19 17:43:23,390 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 [2021-02-19 17:43:23,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 17:43:23,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:23,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:43:23,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:23,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:23,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:23,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:43:23,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 17:43:23,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:23,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:43:23,682 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:23,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:23,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:23,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:23,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:43:23,762 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:23,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:23,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:43:23,766 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:23,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:23,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:23,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:23,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:43:23,844 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:23,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:23,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:43:23,849 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:23,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:23,919 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-02-19 17:43:23,919 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:199, output treesize:175 [2021-02-19 17:43:24,185 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_160, array_4, v_prenex_154, v_prenex_156, v_prenex_158], 1=[array_2, v_prenex_153, v_prenex_155, v_prenex_157, v_prenex_159]} [2021-02-19 17:43:24,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:43:24,191 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:24,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-02-19 17:43:24,197 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:24,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:43:24,203 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:24,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:43:24,208 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:24,362 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 77 [2021-02-19 17:43:24,362 INFO L628 ElimStorePlain]: treesize reduction 144, result has 58.3 percent of original size [2021-02-19 17:43:24,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:43:24,367 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:24,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:24,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-02-19 17:43:24,429 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:24,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:24,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-02-19 17:43:24,489 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:24,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:24,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:43:24,548 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-02-19 17:43:24,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:24,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:24,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:43:24,612 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:24,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:24,672 INFO L518 ElimStorePlain]: Eliminatee v_prenex_153 vanished before elimination [2021-02-19 17:43:24,672 INFO L518 ElimStorePlain]: Eliminatee v_prenex_155 vanished before elimination [2021-02-19 17:43:24,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:24,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:24,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-02-19 17:43:24,677 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:24,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:24,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:43:24,681 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:24,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:24,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:24,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:24,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:24,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:43:24,755 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:24,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:24,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:24,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:43:24,760 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:24,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:24,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:24,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:43:24,764 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:24,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:24,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-02-19 17:43:24,768 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:24,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:24,824 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 10 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-02-19 17:43:24,824 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 15 variables, input treesize:373, output treesize:71 [2021-02-19 17:43:24,881 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:24,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:24,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-02-19 17:43:24,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17792055] [2021-02-19 17:43:24,881 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:43:24,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:24,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:43:24,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:43:24,882 INFO L87 Difference]: Start difference. First operand 174 states and 513 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:25,501 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 80 [2021-02-19 17:43:25,946 WARN L202 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 118 [2021-02-19 17:43:26,110 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 73 [2021-02-19 17:43:26,248 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2021-02-19 17:43:26,573 WARN L202 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 102 [2021-02-19 17:43:26,782 WARN L202 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 80 [2021-02-19 17:43:26,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:26,889 INFO L93 Difference]: Finished difference Result 216 states and 608 transitions. [2021-02-19 17:43:26,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:43:26,889 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:43:26,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:26,890 INFO L225 Difference]: With dead ends: 216 [2021-02-19 17:43:26,890 INFO L226 Difference]: Without dead ends: 208 [2021-02-19 17:43:26,890 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=144, Invalid=612, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:43:26,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-02-19 17:43:26,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 165. [2021-02-19 17:43:26,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.957317073170732) internal successors, (485), 164 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:26,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 485 transitions. [2021-02-19 17:43:26,892 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 485 transitions. Word has length 17 [2021-02-19 17:43:26,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:26,893 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 485 transitions. [2021-02-19 17:43:26,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:26,893 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 485 transitions. [2021-02-19 17:43:26,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:43:26,893 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:26,893 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:27,103 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable649,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:43:27,104 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:27,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:27,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1751800923, now seen corresponding path program 16 times [2021-02-19 17:43:27,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:27,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321034057] [2021-02-19 17:43:27,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:27,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:27,365 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:27,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321034057] [2021-02-19 17:43:27,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198560474] [2021-02-19 17:43:27,365 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 [2021-02-19 17:43:27,385 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:43:27,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:27,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:43:27,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:27,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:27,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:27,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:43:27,466 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:27,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:27,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:27,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-02-19 17:43:27,470 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-02-19 17:43:27,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:27,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:27,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:43:27,475 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:27,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:27,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:43:27,479 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:27,584 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-02-19 17:43:27,585 INFO L628 ElimStorePlain]: treesize reduction 84, result has 62.3 percent of original size [2021-02-19 17:43:27,586 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-02-19 17:43:27,586 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:167, output treesize:139 [2021-02-19 17:43:27,863 INFO L446 ElimStorePlain]: Different costs {0=[array_4, v_prenex_165, v_prenex_167], 1=[array_0, v_prenex_164, v_prenex_166]} [2021-02-19 17:43:27,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:43:27,867 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:27,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:43:27,872 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-02-19 17:43:27,979 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2021-02-19 17:43:27,979 INFO L628 ElimStorePlain]: treesize reduction 24, result has 85.6 percent of original size [2021-02-19 17:43:27,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:43:27,983 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:27,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:43:27,987 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:28,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:28,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-02-19 17:43:28,031 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:28,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-02-19 17:43:28,035 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:28,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:28,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:28,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:28,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:43:28,075 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:28,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:28,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:43:28,079 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:28,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:28,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:28,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:28,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:28,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:43:28,126 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:28,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:28,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-02-19 17:43:28,129 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:28,163 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:28,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:28,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:28,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:43:28,167 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:28,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:28,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-02-19 17:43:28,170 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:28,202 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:28,204 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-02-19 17:43:28,204 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 9 variables, input treesize:163, output treesize:31 [2021-02-19 17:43:28,250 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:28,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:28,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-02-19 17:43:28,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686314980] [2021-02-19 17:43:28,251 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:43:28,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:28,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:43:28,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:43:28,251 INFO L87 Difference]: Start difference. First operand 165 states and 485 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:28,600 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2021-02-19 17:43:28,816 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2021-02-19 17:43:28,999 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2021-02-19 17:43:29,261 WARN L202 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 86 [2021-02-19 17:43:29,477 WARN L202 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2021-02-19 17:43:29,663 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2021-02-19 17:43:29,902 WARN L202 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 78 [2021-02-19 17:43:29,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:30,000 INFO L93 Difference]: Finished difference Result 314 states and 882 transitions. [2021-02-19 17:43:30,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:43:30,001 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:43:30,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:30,002 INFO L225 Difference]: With dead ends: 314 [2021-02-19 17:43:30,002 INFO L226 Difference]: Without dead ends: 310 [2021-02-19 17:43:30,002 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:43:30,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-02-19 17:43:30,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 163. [2021-02-19 17:43:30,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.9444444444444446) internal successors, (477), 162 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:30,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 477 transitions. [2021-02-19 17:43:30,005 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 477 transitions. Word has length 17 [2021-02-19 17:43:30,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:30,005 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 477 transitions. [2021-02-19 17:43:30,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:30,005 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 477 transitions. [2021-02-19 17:43:30,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:43:30,005 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:30,005 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:30,210 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable698,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:43:30,210 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:30,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:30,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1308901783, now seen corresponding path program 17 times [2021-02-19 17:43:30,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:30,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198296311] [2021-02-19 17:43:30,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:30,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:30,533 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:30,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198296311] [2021-02-19 17:43:30,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458106731] [2021-02-19 17:43:30,533 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 [2021-02-19 17:43:30,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:43:30,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:30,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:43:30,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:30,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:30,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:30,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:43:30,657 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:30,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:30,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:30,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:43:30,661 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-02-19 17:43:30,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:30,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:30,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:43:30,666 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:30,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:30,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:43:30,670 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:30,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:30,708 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-02-19 17:43:30,708 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:123, output treesize:111 [2021-02-19 17:43:31,103 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 55=[array_0]} [2021-02-19 17:43:31,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:31,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-02-19 17:43:31,110 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:31,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:31,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:43:31,117 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-02-19 17:43:31,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:31,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-02-19 17:43:31,124 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-02-19 17:43:31,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:31,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:43:31,134 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:31,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:31,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-02-19 17:43:31,141 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-02-19 17:43:31,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:31,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:43:31,154 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:31,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:31,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:43:31,160 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:31,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:31,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:43:31,167 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-02-19 17:43:31,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:31,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:43:31,174 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:31,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:43:31,180 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:31,456 WARN L202 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 98 [2021-02-19 17:43:31,456 INFO L628 ElimStorePlain]: treesize reduction 154, result has 70.3 percent of original size [2021-02-19 17:43:31,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:31,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:31,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:43:31,463 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:31,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:31,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:31,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:43:31,470 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:31,480 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:31,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:31,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:31,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:43:31,487 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:31,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:31,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:31,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:43:31,494 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:31,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:31,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:31,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-02-19 17:43:31,500 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:31,511 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:31,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:31,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:31,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:43:31,518 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:31,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:31,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:31,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:43:31,525 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:31,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:31,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:31,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:31,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-02-19 17:43:31,542 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:31,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:31,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:31,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-02-19 17:43:31,550 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:31,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:31,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:31,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:31,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-02-19 17:43:31,572 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:31,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:31,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-02-19 17:43:31,578 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:31,695 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-02-19 17:43:31,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:31,699 INFO L550 ElimStorePlain]: Start of recursive call 1: 10 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-02-19 17:43:31,699 INFO L247 ElimStorePlain]: Needed 22 recursive calls to eliminate 12 variables, input treesize:419, output treesize:179 [2021-02-19 17:43:31,879 WARN L202 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-02-19 17:43:31,963 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:31,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:31,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-02-19 17:43:31,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476396395] [2021-02-19 17:43:31,964 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:43:31,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:31,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:43:31,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:43:31,964 INFO L87 Difference]: Start difference. First operand 163 states and 477 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:32,398 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 79 [2021-02-19 17:43:32,866 WARN L202 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 88 [2021-02-19 17:43:33,115 WARN L202 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 83 [2021-02-19 17:43:33,516 WARN L202 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 115 [2021-02-19 17:43:34,007 WARN L202 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 98 [2021-02-19 17:43:34,449 WARN L202 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 97 [2021-02-19 17:43:34,851 WARN L202 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 119 [2021-02-19 17:43:35,363 WARN L202 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 100 [2021-02-19 17:43:35,856 WARN L202 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 101 [2021-02-19 17:43:35,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:35,944 INFO L93 Difference]: Finished difference Result 246 states and 701 transitions. [2021-02-19 17:43:35,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:43:35,945 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:43:35,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:35,946 INFO L225 Difference]: With dead ends: 246 [2021-02-19 17:43:35,946 INFO L226 Difference]: Without dead ends: 238 [2021-02-19 17:43:35,946 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:43:35,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-02-19 17:43:35,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 167. [2021-02-19 17:43:35,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.9457831325301207) internal successors, (489), 166 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:35,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 489 transitions. [2021-02-19 17:43:35,948 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 489 transitions. Word has length 17 [2021-02-19 17:43:35,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:35,948 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 489 transitions. [2021-02-19 17:43:35,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:35,948 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 489 transitions. [2021-02-19 17:43:35,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:43:35,949 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:35,949 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:36,161 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable720 [2021-02-19 17:43:36,162 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:36,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:36,162 INFO L82 PathProgramCache]: Analyzing trace with hash -2024967199, now seen corresponding path program 18 times [2021-02-19 17:43:36,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:36,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330084649] [2021-02-19 17:43:36,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:36,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:36,404 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:36,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330084649] [2021-02-19 17:43:36,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786875773] [2021-02-19 17:43:36,405 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) [2021-02-19 17:43:36,441 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 17:43:36,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:36,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:43:36,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:43:36,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:36,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:36,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:43:36,555 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:36,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:36,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:36,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:43:36,560 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:36,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:36,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:36,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:43:36,565 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:36,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:36,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-02-19 17:43:36,570 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-02-19 17:43:36,642 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:36,643 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-02-19 17:43:36,643 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:165, output treesize:221 [2021-02-19 17:43:37,021 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_184, array_4, v_prenex_186, v_prenex_188], 1=[array_0, v_prenex_183, v_prenex_185, v_prenex_187]} [2021-02-19 17:43:37,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:43:37,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:37,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:43:37,033 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:37,112 INFO L628 ElimStorePlain]: treesize reduction 156, result has 34.5 percent of original size [2021-02-19 17:43:37,112 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-02-19 17:43:37,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:43:37,116 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-02-19 17:43:37,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:37,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:43:37,146 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-02-19 17:43:37,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:37,179 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-02-19 17:43:37,179 INFO L518 ElimStorePlain]: Eliminatee v_prenex_183 vanished before elimination [2021-02-19 17:43:37,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:37,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:37,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:43:37,183 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:37,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:37,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:43:37,187 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:37,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:37,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:37,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:37,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:37,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:43:37,230 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:37,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:37,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:43:37,233 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:37,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:37,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:37,273 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-02-19 17:43:37,273 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:252, output treesize:37 [2021-02-19 17:43:37,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:37,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:37,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-02-19 17:43:37,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256685024] [2021-02-19 17:43:37,321 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:43:37,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:37,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:43:37,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:43:37,322 INFO L87 Difference]: Start difference. First operand 167 states and 489 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:37,882 WARN L202 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 77 [2021-02-19 17:43:37,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:37,990 INFO L93 Difference]: Finished difference Result 198 states and 571 transitions. [2021-02-19 17:43:37,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:43:37,991 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:43:37,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:37,992 INFO L225 Difference]: With dead ends: 198 [2021-02-19 17:43:37,992 INFO L226 Difference]: Without dead ends: 194 [2021-02-19 17:43:37,992 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:43:37,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-02-19 17:43:37,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 171. [2021-02-19 17:43:37,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.958823529411765) internal successors, (503), 170 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:37,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 503 transitions. [2021-02-19 17:43:37,994 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 503 transitions. Word has length 17 [2021-02-19 17:43:37,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:37,994 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 503 transitions. [2021-02-19 17:43:37,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:37,994 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 503 transitions. [2021-02-19 17:43:37,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:43:37,994 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:37,995 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:38,208 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable751 [2021-02-19 17:43:38,209 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:38,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:38,209 INFO L82 PathProgramCache]: Analyzing trace with hash 2023379925, now seen corresponding path program 19 times [2021-02-19 17:43:38,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:38,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650409901] [2021-02-19 17:43:38,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:38,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:38,457 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:38,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650409901] [2021-02-19 17:43:38,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675979775] [2021-02-19 17:43:38,457 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 [2021-02-19 17:43:38,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:38,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:43:38,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:38,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:38,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:38,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:43:38,593 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:38,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:38,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:38,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:43:38,598 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:38,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:38,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:38,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-02-19 17:43:38,603 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-02-19 17:43:38,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:38,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:43:38,608 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:38,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:38,695 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-02-19 17:43:38,695 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:205, output treesize:261 [2021-02-19 17:43:38,837 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_190, v_prenex_192, v_prenex_194, array_4], 1=[v_prenex_191, v_prenex_193, array_0, v_prenex_189]} [2021-02-19 17:43:38,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:43:38,843 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:38,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:43:38,850 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-02-19 17:43:39,195 WARN L202 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 76 [2021-02-19 17:43:39,195 INFO L628 ElimStorePlain]: treesize reduction 267, result has 61.9 percent of original size [2021-02-19 17:43:39,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:43:39,200 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-02-19 17:43:39,442 WARN L202 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 70 [2021-02-19 17:43:39,442 INFO L628 ElimStorePlain]: treesize reduction 124, result has 72.1 percent of original size [2021-02-19 17:43:39,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:43:39,447 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:39,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-02-19 17:43:39,452 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:39,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:43:39,457 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:39,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-02-19 17:43:39,462 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:39,647 WARN L202 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2021-02-19 17:43:39,648 INFO L628 ElimStorePlain]: treesize reduction 31, result has 89.5 percent of original size [2021-02-19 17:43:39,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-02-19 17:43:39,652 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:39,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:39,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:39,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:39,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:43:39,748 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:39,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:39,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:43:39,752 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:39,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:39,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:39,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:39,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:39,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:43:39,854 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:39,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:39,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:39,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-02-19 17:43:39,859 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:39,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:39,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:43:39,863 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:39,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:39,947 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-02-19 17:43:39,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:39,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:39,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:43:39,952 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:39,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:39,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:43:39,956 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:39,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:40,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:40,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-02-19 17:43:40,046 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 8 variables, input treesize:697, output treesize:176 [2021-02-19 17:43:40,283 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:40,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:40,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-02-19 17:43:40,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356037212] [2021-02-19 17:43:40,283 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:43:40,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:40,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:43:40,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:43:40,284 INFO L87 Difference]: Start difference. First operand 171 states and 503 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:40,685 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-02-19 17:43:41,000 WARN L202 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-02-19 17:43:41,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:41,148 INFO L93 Difference]: Finished difference Result 209 states and 604 transitions. [2021-02-19 17:43:41,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:43:41,149 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:43:41,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:41,149 INFO L225 Difference]: With dead ends: 209 [2021-02-19 17:43:41,150 INFO L226 Difference]: Without dead ends: 205 [2021-02-19 17:43:41,150 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:43:41,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-02-19 17:43:41,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 169. [2021-02-19 17:43:41,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.9464285714285716) internal successors, (495), 168 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:41,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 495 transitions. [2021-02-19 17:43:41,152 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 495 transitions. Word has length 17 [2021-02-19 17:43:41,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:41,152 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 495 transitions. [2021-02-19 17:43:41,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:41,152 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 495 transitions. [2021-02-19 17:43:41,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:43:41,152 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:41,152 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:41,353 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable775 [2021-02-19 17:43:41,353 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:41,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:41,353 INFO L82 PathProgramCache]: Analyzing trace with hash -2098339679, now seen corresponding path program 20 times [2021-02-19 17:43:41,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:41,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344371592] [2021-02-19 17:43:41,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:41,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:41,567 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:41,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344371592] [2021-02-19 17:43:41,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694355342] [2021-02-19 17:43:41,568 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 [2021-02-19 17:43:41,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:43:41,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:41,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:43:41,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:41,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:43:41,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:41,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:43:41,694 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:41,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:43:41,698 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-02-19 17:43:41,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:43:41,701 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:41,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:41,742 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-02-19 17:43:41,742 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:135, output treesize:125 [2021-02-19 17:43:41,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:41,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:41,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:43:41,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 17:43:41,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:41,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:41,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:43:41,841 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:41,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:41,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:41,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:43:41,846 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:41,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:41,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:41,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:43:41,851 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:41,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:41,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:41,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-02-19 17:43:41,857 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 4 xjuncts. [2021-02-19 17:43:41,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:41,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:41,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:43:41,864 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:41,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:41,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:41,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-02-19 17:43:41,871 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-02-19 17:43:41,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:41,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:41,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:43:41,882 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:41,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:41,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:41,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:43:41,888 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:41,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:41,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-02-19 17:43:41,893 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 2 xjuncts. [2021-02-19 17:43:42,108 WARN L202 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2021-02-19 17:43:42,108 INFO L628 ElimStorePlain]: treesize reduction 202, result has 57.3 percent of original size [2021-02-19 17:43:42,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:42,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:42,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:43:42,113 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:42,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:42,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:42,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:43:42,118 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:42,128 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:42,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:42,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:42,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:43:42,132 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:42,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:42,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:42,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:43:42,138 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:42,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:42,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:42,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:43:42,143 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:42,152 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:42,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:42,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:42,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:43:42,157 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:42,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:42,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:42,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:43:42,162 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:42,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:42,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:42,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 15 [2021-02-19 17:43:42,167 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:42,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:42,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:42,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:43:42,182 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:42,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:42,266 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-02-19 17:43:42,266 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 2 variables, input treesize:377, output treesize:160 [2021-02-19 17:43:42,441 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:42,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:42,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:43:42,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993788030] [2021-02-19 17:43:42,441 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:43:42,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:42,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:43:42,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:43:42,442 INFO L87 Difference]: Start difference. First operand 169 states and 495 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:43,031 WARN L202 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 62 [2021-02-19 17:43:43,244 WARN L202 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-02-19 17:43:43,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:43,330 INFO L93 Difference]: Finished difference Result 199 states and 579 transitions. [2021-02-19 17:43:43,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:43:43,330 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:43:43,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:43,331 INFO L225 Difference]: With dead ends: 199 [2021-02-19 17:43:43,331 INFO L226 Difference]: Without dead ends: 195 [2021-02-19 17:43:43,331 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:43:43,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-02-19 17:43:43,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 173. [2021-02-19 17:43:43,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.947674418604651) internal successors, (507), 172 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:43,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 507 transitions. [2021-02-19 17:43:43,333 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 507 transitions. Word has length 17 [2021-02-19 17:43:43,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:43,333 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 507 transitions. [2021-02-19 17:43:43,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:43,334 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 507 transitions. [2021-02-19 17:43:43,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:43:43,334 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:43,334 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:43,534 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable794 [2021-02-19 17:43:43,534 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:43,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:43,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1062057503, now seen corresponding path program 21 times [2021-02-19 17:43:43,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:43,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409697118] [2021-02-19 17:43:43,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:43,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:43,792 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:43,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409697118] [2021-02-19 17:43:43,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445839526] [2021-02-19 17:43:43,792 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 [2021-02-19 17:43:43,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 17:43:43,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:43,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:43:43,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:44,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:44,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:44,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:43:44,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:44,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:44,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:43:44,099 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:44,212 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-02-19 17:43:44,213 INFO L628 ElimStorePlain]: treesize reduction 28, result has 84.5 percent of original size [2021-02-19 17:43:44,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:44,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:44,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:43:44,218 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:44,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:44,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:43:44,222 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:44,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:44,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:44,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:44,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:43:44,276 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:44,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:44,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:43:44,281 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-02-19 17:43:44,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:44,338 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 5 dim-0 vars, and 5 xjuncts. [2021-02-19 17:43:44,338 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:195, output treesize:141 [2021-02-19 17:43:44,560 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_206, array_4, v_prenex_204], 1=[array_0, v_prenex_203, v_prenex_205]} [2021-02-19 17:43:44,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:43:44,565 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:44,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-02-19 17:43:44,571 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:44,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-02-19 17:43:44,577 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:44,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-02-19 17:43:44,582 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:44,705 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-02-19 17:43:44,705 INFO L628 ElimStorePlain]: treesize reduction 31, result has 85.3 percent of original size [2021-02-19 17:43:44,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:43:44,710 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-02-19 17:43:44,772 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:44,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:43:44,777 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:44,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:43:44,781 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:44,838 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:44,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:44,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:44,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:43:44,843 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:44,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:44,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:43:44,847 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:44,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:44,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:44,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:44,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:44,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:43:44,916 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:44,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:44,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-02-19 17:43:44,920 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:44,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:44,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:44,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:44,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:43:44,980 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:44,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:44,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:44,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:43:44,985 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:44,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:44,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:44,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-02-19 17:43:44,989 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:44,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:44,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-02-19 17:43:44,993 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:45,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:45,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-02-19 17:43:45,046 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 9 variables, input treesize:237, output treesize:57 [2021-02-19 17:43:45,097 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:45,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:45,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-02-19 17:43:45,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257518150] [2021-02-19 17:43:45,098 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:43:45,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:45,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:43:45,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:43:45,098 INFO L87 Difference]: Start difference. First operand 173 states and 507 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:45,492 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-02-19 17:43:45,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:45,767 INFO L93 Difference]: Finished difference Result 208 states and 602 transitions. [2021-02-19 17:43:45,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:43:45,768 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:43:45,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:45,768 INFO L225 Difference]: With dead ends: 208 [2021-02-19 17:43:45,768 INFO L226 Difference]: Without dead ends: 204 [2021-02-19 17:43:45,769 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:43:45,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-02-19 17:43:45,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 177. [2021-02-19 17:43:45,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.9488636363636362) internal successors, (519), 176 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:45,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 519 transitions. [2021-02-19 17:43:45,771 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 519 transitions. Word has length 17 [2021-02-19 17:43:45,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:45,771 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 519 transitions. [2021-02-19 17:43:45,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:45,771 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 519 transitions. [2021-02-19 17:43:45,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:43:45,771 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:45,771 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:45,984 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable813,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:43:45,984 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:45,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:45,984 INFO L82 PathProgramCache]: Analyzing trace with hash 419180367, now seen corresponding path program 22 times [2021-02-19 17:43:45,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:45,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220014489] [2021-02-19 17:43:45,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:45,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:46,190 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:46,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220014489] [2021-02-19 17:43:46,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017845200] [2021-02-19 17:43:46,191 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 [2021-02-19 17:43:46,210 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:43:46,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:46,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:43:46,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:46,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:46,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:46,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:43:46,407 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:46,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:46,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:46,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-02-19 17:43:46,415 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-02-19 17:43:46,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:46,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:46,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:43:46,422 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:46,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:46,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:43:46,427 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:46,517 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:46,527 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-02-19 17:43:46,527 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:199, output treesize:259 [2021-02-19 17:43:46,738 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 10=[array_2]} [2021-02-19 17:43:46,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:46,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:46,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-02-19 17:43:46,745 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:46,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:46,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:46,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:43:46,752 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-02-19 17:43:46,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:46,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:46,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:43:46,758 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:46,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:46,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:46,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:43:46,765 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:46,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:46,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:46,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:43:46,772 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:46,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:46,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:46,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 36 [2021-02-19 17:43:46,780 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:46,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:46,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:46,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:43:46,787 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:46,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:46,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:46,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 38 [2021-02-19 17:43:46,795 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:46,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:46,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:46,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:43:46,803 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:46,808 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 17:43:46,809 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:46,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:46,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:46,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:43:46,817 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:46,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:46,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:46,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-02-19 17:43:46,824 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:46,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:46,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:46,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:43:46,831 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:46,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:46,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:43:46,838 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 2 xjuncts. [2021-02-19 17:43:47,160 WARN L202 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 75 [2021-02-19 17:43:47,161 INFO L628 ElimStorePlain]: treesize reduction 250, result has 57.2 percent of original size [2021-02-19 17:43:47,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:47,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:47,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-02-19 17:43:47,167 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:47,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:47,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:47,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:43:47,173 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:47,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:47,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:47,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-02-19 17:43:47,179 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:47,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:47,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:47,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:47,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:43:47,195 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:47,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:47,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:47,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:43:47,201 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:47,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:47,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:47,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:43:47,207 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:47,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:47,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:47,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:43:47,213 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:47,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:47,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:47,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:43:47,219 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:47,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:47,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:47,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:43:47,233 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:47,358 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-02-19 17:43:47,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:47,362 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-02-19 17:43:47,362 INFO L247 ElimStorePlain]: Needed 24 recursive calls to eliminate 7 variables, input treesize:689, output treesize:139 [2021-02-19 17:43:47,548 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:47,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:47,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-02-19 17:43:47,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264265543] [2021-02-19 17:43:47,549 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:43:47,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:47,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:43:47,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:43:47,549 INFO L87 Difference]: Start difference. First operand 177 states and 519 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:47,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:47,981 INFO L93 Difference]: Finished difference Result 212 states and 604 transitions. [2021-02-19 17:43:47,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:43:47,982 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:43:47,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:47,983 INFO L225 Difference]: With dead ends: 212 [2021-02-19 17:43:47,983 INFO L226 Difference]: Without dead ends: 208 [2021-02-19 17:43:47,983 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:43:47,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-02-19 17:43:47,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 180. [2021-02-19 17:43:47,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.9664804469273744) internal successors, (531), 179 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:47,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 531 transitions. [2021-02-19 17:43:47,985 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 531 transitions. Word has length 17 [2021-02-19 17:43:47,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:47,986 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 531 transitions. [2021-02-19 17:43:47,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:47,986 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 531 transitions. [2021-02-19 17:43:47,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:43:47,986 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:47,986 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:48,189 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable853,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:43:48,190 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:48,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:48,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1251795649, now seen corresponding path program 23 times [2021-02-19 17:43:48,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:48,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516966478] [2021-02-19 17:43:48,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:48,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:48,404 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:48,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516966478] [2021-02-19 17:43:48,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128408873] [2021-02-19 17:43:48,405 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 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 [2021-02-19 17:43:48,424 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:43:48,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:48,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:43:48,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:48,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:48,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:48,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:43:48,679 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:48,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:48,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:43:48,684 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:48,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:48,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:48,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:48,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:43:48,762 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:48,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:48,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:43:48,766 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:48,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:48,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:48,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:48,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:43:48,840 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-02-19 17:43:48,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:48,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:43:48,845 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:48,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:48,926 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-02-19 17:43:48,926 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:199, output treesize:175 [2021-02-19 17:43:49,225 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_228, array_4, v_prenex_222, v_prenex_224, v_prenex_226], 1=[array_2, v_prenex_221, v_prenex_223, v_prenex_225, v_prenex_227]} [2021-02-19 17:43:49,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:43:49,231 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 17:43:49,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:43:49,237 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:49,423 WARN L202 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 75 [2021-02-19 17:43:49,424 INFO L628 ElimStorePlain]: treesize reduction 155, result has 58.9 percent of original size [2021-02-19 17:43:49,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-02-19 17:43:49,429 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:49,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:49,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:43:49,505 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-02-19 17:43:49,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:49,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-02-19 17:43:49,586 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:49,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:49,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-02-19 17:43:49,665 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:49,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17 [2021-02-19 17:43:49,670 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:49,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:43:49,675 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:49,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:43:49,680 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:49,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:49,743 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:43:49,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:49,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:49,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-02-19 17:43:49,749 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:49,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:49,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:43:49,754 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:49,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:49,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:49,824 INFO L518 ElimStorePlain]: Eliminatee v_prenex_223 vanished before elimination [2021-02-19 17:43:49,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:49,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:49,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:43:49,830 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:49,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:49,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:49,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:43:49,835 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:49,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:49,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:49,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:43:49,840 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:49,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:49,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-02-19 17:43:49,845 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:49,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:49,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:49,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:43:49,912 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:49,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:49,973 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 10 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-02-19 17:43:49,973 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 15 variables, input treesize:373, output treesize:71 [2021-02-19 17:43:50,038 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:50,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:50,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-02-19 17:43:50,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148324712] [2021-02-19 17:43:50,038 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:43:50,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:50,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:43:50,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:43:50,039 INFO L87 Difference]: Start difference. First operand 180 states and 531 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:50,475 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2021-02-19 17:43:50,684 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 90 [2021-02-19 17:43:50,938 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 71 [2021-02-19 17:43:51,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:51,076 INFO L93 Difference]: Finished difference Result 212 states and 596 transitions. [2021-02-19 17:43:51,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:43:51,077 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:43:51,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:51,078 INFO L225 Difference]: With dead ends: 212 [2021-02-19 17:43:51,078 INFO L226 Difference]: Without dead ends: 204 [2021-02-19 17:43:51,078 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:43:51,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-02-19 17:43:51,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 174. [2021-02-19 17:43:51,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.947976878612717) internal successors, (510), 173 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:51,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 510 transitions. [2021-02-19 17:43:51,080 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 510 transitions. Word has length 17 [2021-02-19 17:43:51,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:51,080 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 510 transitions. [2021-02-19 17:43:51,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:51,080 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 510 transitions. [2021-02-19 17:43:51,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:43:51,080 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:51,080 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:51,286 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable879,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:43:51,286 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:51,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:51,286 INFO L82 PathProgramCache]: Analyzing trace with hash 968096777, now seen corresponding path program 24 times [2021-02-19 17:43:51,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:51,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111319776] [2021-02-19 17:43:51,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:51,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:51,635 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:51,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111319776] [2021-02-19 17:43:51,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194441011] [2021-02-19 17:43:51,635 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 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 [2021-02-19 17:43:51,654 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:43:51,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:51,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:43:51,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:51,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:51,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:51,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:43:51,809 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:51,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:51,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:43:51,814 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-02-19 17:43:51,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:51,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:51,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:51,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:43:51,871 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:51,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:51,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:43:51,875 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:51,918 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:51,923 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-02-19 17:43:51,924 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:137, output treesize:125 [2021-02-19 17:43:52,263 INFO L446 ElimStorePlain]: Different costs {0=[array_4, v_prenex_234, v_prenex_236, v_prenex_238], 1=[array_0, v_prenex_233, v_prenex_235, v_prenex_237]} [2021-02-19 17:43:52,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:43:52,269 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 17:43:52,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:43:52,275 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:52,447 WARN L202 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 67 [2021-02-19 17:43:52,448 INFO L628 ElimStorePlain]: treesize reduction 93, result has 70.7 percent of original size [2021-02-19 17:43:52,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-02-19 17:43:52,453 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:52,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-02-19 17:43:52,458 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:52,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-02-19 17:43:52,463 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:52,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:43:52,468 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:52,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:52,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:43:52,535 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-02-19 17:43:52,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:52,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-02-19 17:43:52,609 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:52,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:52,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:52,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:52,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:43:52,681 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:52,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:52,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:43:52,686 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:52,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:52,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:52,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:52,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:52,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-02-19 17:43:52,766 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:52,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:52,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:52,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:43:52,771 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:52,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:52,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:52,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-02-19 17:43:52,776 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:52,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:52,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:43:52,780 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:52,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:52,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:52,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:52,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:43:52,849 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:52,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:52,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:43:52,853 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:52,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:52,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:52,923 INFO L518 ElimStorePlain]: Eliminatee v_prenex_237 vanished before elimination [2021-02-19 17:43:52,926 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-02-19 17:43:52,926 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 12 variables, input treesize:313, output treesize:70 [2021-02-19 17:43:52,981 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:52,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:52,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-02-19 17:43:52,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536329617] [2021-02-19 17:43:52,981 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:43:52,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:52,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:43:52,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:43:52,981 INFO L87 Difference]: Start difference. First operand 174 states and 510 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:53,572 WARN L202 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 93 [2021-02-19 17:43:53,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:53,687 INFO L93 Difference]: Finished difference Result 202 states and 587 transitions. [2021-02-19 17:43:53,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:43:53,687 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:43:53,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:53,688 INFO L225 Difference]: With dead ends: 202 [2021-02-19 17:43:53,688 INFO L226 Difference]: Without dead ends: 198 [2021-02-19 17:43:53,688 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:43:53,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-02-19 17:43:53,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 176. [2021-02-19 17:43:53,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.9485714285714284) internal successors, (516), 175 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:53,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 516 transitions. [2021-02-19 17:43:53,690 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 516 transitions. Word has length 17 [2021-02-19 17:43:53,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:53,691 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 516 transitions. [2021-02-19 17:43:53,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:53,691 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 516 transitions. [2021-02-19 17:43:53,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:43:53,691 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:53,691 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:53,891 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable928 [2021-02-19 17:43:53,891 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:53,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:53,892 INFO L82 PathProgramCache]: Analyzing trace with hash 153290623, now seen corresponding path program 25 times [2021-02-19 17:43:53,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:53,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504807746] [2021-02-19 17:43:53,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:53,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:54,254 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:54,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504807746] [2021-02-19 17:43:54,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032817730] [2021-02-19 17:43:54,254 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 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 [2021-02-19 17:43:54,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:54,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:43:54,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:54,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:54,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:54,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:43:54,503 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 17:43:54,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:54,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:43:54,510 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:54,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:54,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:54,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:54,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:43:54,597 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:54,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:54,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:43:54,602 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:54,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:54,681 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-02-19 17:43:54,681 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:208, output treesize:198 [2021-02-19 17:43:54,887 INFO L446 ElimStorePlain]: Different costs {1=[array_0], 36=[array_2]} [2021-02-19 17:43:54,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:54,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:54,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-02-19 17:43:54,895 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 17:43:54,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:54,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:54,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:43:54,903 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:54,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:54,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:54,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-02-19 17:43:54,911 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-02-19 17:43:54,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:54,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:54,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:43:54,919 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:54,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:54,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:54,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-02-19 17:43:54,927 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 4 xjuncts. [2021-02-19 17:43:54,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:54,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:54,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:43:54,935 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:54,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:54,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:54,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:43:54,945 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:54,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:54,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:54,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:43:54,953 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:54,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:54,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:54,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:43:54,961 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:54,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:54,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-02-19 17:43:54,969 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 4 xjuncts. [2021-02-19 17:43:55,326 WARN L202 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 87 [2021-02-19 17:43:55,327 INFO L628 ElimStorePlain]: treesize reduction 288, result has 58.0 percent of original size [2021-02-19 17:43:55,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:55,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:55,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-02-19 17:43:55,334 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:55,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:55,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:55,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:43:55,340 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:55,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:55,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:55,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:55,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:43:55,357 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:55,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:55,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:55,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:43:55,364 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:55,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:55,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:55,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:43:55,370 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:55,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:55,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:55,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:43:55,376 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:55,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:55,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:55,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:55,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-02-19 17:43:55,393 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:55,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:55,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:55,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 15 [2021-02-19 17:43:55,399 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:55,416 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:55,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:55,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:55,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:43:55,422 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:55,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:55,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-02-19 17:43:55,428 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:55,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:55,578 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-02-19 17:43:55,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:55,581 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-02-19 17:43:55,581 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 10 variables, input treesize:520, output treesize:238 [2021-02-19 17:43:55,795 WARN L202 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-02-19 17:43:55,920 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:55,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:55,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-02-19 17:43:55,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515780463] [2021-02-19 17:43:55,920 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:43:55,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:55,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:43:55,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:43:55,921 INFO L87 Difference]: Start difference. First operand 176 states and 516 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:56,527 WARN L202 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 92 [2021-02-19 17:43:56,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:43:56,659 INFO L93 Difference]: Finished difference Result 199 states and 579 transitions. [2021-02-19 17:43:56,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 17:43:56,659 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:43:56,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:43:56,660 INFO L225 Difference]: With dead ends: 199 [2021-02-19 17:43:56,660 INFO L226 Difference]: Without dead ends: 195 [2021-02-19 17:43:56,660 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:43:56,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-02-19 17:43:56,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 174. [2021-02-19 17:43:56,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.947976878612717) internal successors, (510), 173 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:56,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 510 transitions. [2021-02-19 17:43:56,662 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 510 transitions. Word has length 17 [2021-02-19 17:43:56,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:43:56,662 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 510 transitions. [2021-02-19 17:43:56,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:56,663 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 510 transitions. [2021-02-19 17:43:56,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:43:56,663 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:43:56,663 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:43:56,870 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable977,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:43:56,870 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:43:56,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:43:56,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1175189759, now seen corresponding path program 26 times [2021-02-19 17:43:56,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:43:56,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27736920] [2021-02-19 17:43:56,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:43:56,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:43:57,083 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:57,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27736920] [2021-02-19 17:43:57,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119702034] [2021-02-19 17:43:57,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 17:43:57,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:43:57,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:43:57,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:43:57,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:43:57,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:57,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:57,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:43:57,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:57,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:57,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:57,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-02-19 17:43:57,269 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-02-19 17:43:57,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:57,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:57,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:43:57,275 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:57,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:57,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:43:57,280 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:57,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:57,383 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-02-19 17:43:57,383 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:183, output treesize:243 [2021-02-19 17:43:57,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:57,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:57,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:43:57,717 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 17:43:57,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:57,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:43:57,735 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:58,070 WARN L202 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 90 [2021-02-19 17:43:58,070 INFO L628 ElimStorePlain]: treesize reduction 233, result has 63.1 percent of original size [2021-02-19 17:43:58,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:58,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:58,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-02-19 17:43:58,080 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:58,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:58,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:58,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-02-19 17:43:58,087 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:58,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:58,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:58,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:43:58,094 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:58,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:58,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:58,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:43:58,101 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:58,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:58,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:58,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 38 [2021-02-19 17:43:58,108 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:58,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:58,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-02-19 17:43:58,115 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:58,340 WARN L202 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 86 [2021-02-19 17:43:58,340 INFO L628 ElimStorePlain]: treesize reduction 55, result has 84.5 percent of original size [2021-02-19 17:43:58,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:58,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:43:58,346 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:58,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:58,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:43:58,352 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:58,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:58,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:43:58,357 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:58,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:58,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:43:58,363 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:58,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-02-19 17:43:58,368 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:58,472 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-02-19 17:43:58,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:58,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:58,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-02-19 17:43:58,478 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:58,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:43:58,483 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:58,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:58,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:58,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:58,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:43:58,598 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 2 xjuncts. [2021-02-19 17:43:58,702 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-02-19 17:43:58,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:58,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:43:58,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:43:58,708 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:58,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:43:58,712 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:58,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:58,824 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-02-19 17:43:58,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:58,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-02-19 17:43:58,829 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-02-19 17:43:58,930 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-02-19 17:43:58,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:43:58,930 INFO L518 ElimStorePlain]: Eliminatee v_prenex_256 vanished before elimination [2021-02-19 17:43:58,933 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-02-19 17:43:58,933 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 12 variables, input treesize:629, output treesize:151 [2021-02-19 17:43:59,150 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:43:59,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:43:59,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:43:59,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884699417] [2021-02-19 17:43:59,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:43:59,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:43:59,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:43:59,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:43:59,151 INFO L87 Difference]: Start difference. First operand 174 states and 510 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:43:59,634 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 94 [2021-02-19 17:43:59,864 WARN L202 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 98 [2021-02-19 17:44:00,111 WARN L202 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-02-19 17:44:00,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:44:00,378 INFO L93 Difference]: Finished difference Result 222 states and 626 transitions. [2021-02-19 17:44:00,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:44:00,379 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:44:00,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:44:00,380 INFO L225 Difference]: With dead ends: 222 [2021-02-19 17:44:00,380 INFO L226 Difference]: Without dead ends: 214 [2021-02-19 17:44:00,380 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:44:00,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-02-19 17:44:00,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 178. [2021-02-19 17:44:00,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.9604519774011298) internal successors, (524), 177 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:44:00,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 524 transitions. [2021-02-19 17:44:00,382 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 524 transitions. Word has length 17 [2021-02-19 17:44:00,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:44:00,382 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 524 transitions. [2021-02-19 17:44:00,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:44:00,382 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 524 transitions. [2021-02-19 17:44:00,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:44:00,383 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:44:00,383 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:44:00,585 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1022 [2021-02-19 17:44:00,586 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:44:00,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:44:00,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1161789777, now seen corresponding path program 27 times [2021-02-19 17:44:00,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:44:00,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248387320] [2021-02-19 17:44:00,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:44:00,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:44:00,825 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:00,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248387320] [2021-02-19 17:44:00,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792645539] [2021-02-19 17:44:00,826 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 [2021-02-19 17:44:00,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 17:44:00,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:44:00,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:44:00,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:44:00,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:00,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:00,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-02-19 17:44:00,958 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-02-19 17:44:00,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:00,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:00,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:44:00,963 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:00,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:00,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:00,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:44:00,968 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:00,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:00,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:44:00,977 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:01,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:01,072 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-02-19 17:44:01,072 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:199, output treesize:259 [2021-02-19 17:44:01,230 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_260, v_prenex_262, array_4, v_prenex_258], 1=[v_prenex_261, array_2, v_prenex_257, v_prenex_259]} [2021-02-19 17:44:01,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:44:01,237 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:01,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:44:01,243 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-02-19 17:44:01,610 WARN L202 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 75 [2021-02-19 17:44:01,611 INFO L628 ElimStorePlain]: treesize reduction 269, result has 61.4 percent of original size [2021-02-19 17:44:01,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-02-19 17:44:01,617 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:01,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:44:01,622 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:01,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-02-19 17:44:01,628 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:01,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 38 [2021-02-19 17:44:01,633 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:01,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:44:01,639 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:01,643 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 17:44:01,644 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:01,895 WARN L202 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 71 [2021-02-19 17:44:01,895 INFO L628 ElimStorePlain]: treesize reduction 21, result has 93.9 percent of original size [2021-02-19 17:44:01,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-02-19 17:44:01,901 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:02,022 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-02-19 17:44:02,023 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:02,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:44:02,028 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 2 xjuncts. [2021-02-19 17:44:02,231 WARN L202 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2021-02-19 17:44:02,231 INFO L628 ElimStorePlain]: treesize reduction 90, result has 72.5 percent of original size [2021-02-19 17:44:02,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:02,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:02,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:44:02,236 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:02,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:02,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:02,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:44:02,242 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:02,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:02,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:44:02,246 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:02,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:02,339 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:44:02,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:02,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:02,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-02-19 17:44:02,344 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:02,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:02,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:44:02,348 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:02,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:02,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:02,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:02,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:02,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:44:02,454 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:02,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:02,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:44:02,458 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:02,466 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:02,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:02,558 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-02-19 17:44:02,558 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 8 variables, input treesize:693, output treesize:170 [2021-02-19 17:44:02,785 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:02,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:44:02,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-02-19 17:44:02,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980696834] [2021-02-19 17:44:02,785 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:44:02,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:44:02,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:44:02,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:44:02,786 INFO L87 Difference]: Start difference. First operand 178 states and 524 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:44:03,293 WARN L202 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2021-02-19 17:44:03,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:44:03,444 INFO L93 Difference]: Finished difference Result 205 states and 590 transitions. [2021-02-19 17:44:03,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 17:44:03,444 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:44:03,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:44:03,445 INFO L225 Difference]: With dead ends: 205 [2021-02-19 17:44:03,445 INFO L226 Difference]: Without dead ends: 201 [2021-02-19 17:44:03,445 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:44:03,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-02-19 17:44:03,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 176. [2021-02-19 17:44:03,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.9485714285714284) internal successors, (516), 175 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:44:03,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 516 transitions. [2021-02-19 17:44:03,447 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 516 transitions. Word has length 17 [2021-02-19 17:44:03,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:44:03,447 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 516 transitions. [2021-02-19 17:44:03,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:44:03,447 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 516 transitions. [2021-02-19 17:44:03,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:44:03,448 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:44:03,448 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:44:03,649 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1065,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:44:03,650 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:44:03,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:44:03,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1517773271, now seen corresponding path program 28 times [2021-02-19 17:44:03,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:44:03,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690434879] [2021-02-19 17:44:03,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:44:03,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:44:03,853 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:03,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690434879] [2021-02-19 17:44:03,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512530243] [2021-02-19 17:44:03,853 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 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 [2021-02-19 17:44:03,871 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:44:03,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:44:03,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:44:03,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:44:03,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:03,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:44:03,982 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:03,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:03,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:44:03,986 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:03,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:03,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:44:03,991 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:03,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:44:03,995 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-02-19 17:44:04,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:04,054 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-02-19 17:44:04,054 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:157, output treesize:147 [2021-02-19 17:44:04,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:04,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:04,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:44:04,340 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:04,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:04,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:44:04,346 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-02-19 17:44:04,639 WARN L202 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 85 [2021-02-19 17:44:04,639 INFO L628 ElimStorePlain]: treesize reduction 98, result has 77.0 percent of original size [2021-02-19 17:44:04,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-02-19 17:44:04,645 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:04,771 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-02-19 17:44:04,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:04,771 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:44:04,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:04,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:04,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:44:04,777 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:04,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:04,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:04,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-02-19 17:44:04,785 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-02-19 17:44:04,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:04,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:04,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-02-19 17:44:04,792 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-02-19 17:44:04,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:04,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:44:04,798 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:04,931 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-02-19 17:44:04,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:04,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:04,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:04,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:44:04,940 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:04,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:04,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:04,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-02-19 17:44:04,949 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:04,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:04,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:04,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:04,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:44:04,967 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:04,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:04,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:04,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-02-19 17:44:04,974 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:04,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:04,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:04,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-02-19 17:44:04,980 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:04,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:05,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:05,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:44:05,002 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:05,130 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-02-19 17:44:05,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:05,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:05,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:44:05,137 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 2 xjuncts. [2021-02-19 17:44:05,273 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-02-19 17:44:05,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:05,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:05,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:05,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:44:05,280 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:05,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:05,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:44:05,286 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:05,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:05,429 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-02-19 17:44:05,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:05,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:05,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:05,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:44:05,436 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:05,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:05,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:05,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-02-19 17:44:05,442 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:05,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:05,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:05,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-02-19 17:44:05,459 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:05,588 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-02-19 17:44:05,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:05,592 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-02-19 17:44:05,592 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 12 variables, input treesize:424, output treesize:176 [2021-02-19 17:44:05,791 WARN L202 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-02-19 17:44:05,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:05,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:44:05,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:44:05,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119693767] [2021-02-19 17:44:05,884 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:44:05,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:44:05,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:44:05,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:44:05,884 INFO L87 Difference]: Start difference. First operand 176 states and 516 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:44:06,361 WARN L202 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-02-19 17:44:06,735 WARN L202 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 57 [2021-02-19 17:44:06,961 WARN L202 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2021-02-19 17:44:07,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:44:07,043 INFO L93 Difference]: Finished difference Result 207 states and 593 transitions. [2021-02-19 17:44:07,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:44:07,044 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:44:07,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:44:07,044 INFO L225 Difference]: With dead ends: 207 [2021-02-19 17:44:07,044 INFO L226 Difference]: Without dead ends: 199 [2021-02-19 17:44:07,045 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:44:07,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-02-19 17:44:07,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 176. [2021-02-19 17:44:07,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.9485714285714284) internal successors, (516), 175 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:44:07,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 516 transitions. [2021-02-19 17:44:07,047 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 516 transitions. Word has length 17 [2021-02-19 17:44:07,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:44:07,047 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 516 transitions. [2021-02-19 17:44:07,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:44:07,047 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 516 transitions. [2021-02-19 17:44:07,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:44:07,047 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:44:07,047 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:44:07,261 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1085,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:44:07,261 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:44:07,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:44:07,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1096749261, now seen corresponding path program 29 times [2021-02-19 17:44:07,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:44:07,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109837159] [2021-02-19 17:44:07,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:44:07,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:44:07,499 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:07,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109837159] [2021-02-19 17:44:07,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094448396] [2021-02-19 17:44:07,499 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 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 [2021-02-19 17:44:07,523 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:44:07,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:44:07,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:44:07,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:44:07,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:07,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:07,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:44:07,743 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:07,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:07,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:44:07,748 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:07,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:07,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:07,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:07,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:44:07,806 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-02-19 17:44:07,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:07,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:44:07,812 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:07,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:07,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-02-19 17:44:07,872 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:155, output treesize:143 [2021-02-19 17:44:08,156 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 10=[array_0]} [2021-02-19 17:44:08,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:08,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-02-19 17:44:08,162 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 17:44:08,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:08,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-02-19 17:44:08,168 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:08,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:08,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:44:08,174 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:08,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:08,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:44:08,180 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-02-19 17:44:08,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:08,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-02-19 17:44:08,187 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 4 xjuncts. [2021-02-19 17:44:08,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:08,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:44:08,194 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:08,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:08,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:44:08,201 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:08,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:08,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:44:08,207 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:08,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:08,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:44:08,214 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 2 xjuncts. [2021-02-19 17:44:08,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:44:08,220 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:08,538 WARN L202 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 77 [2021-02-19 17:44:08,538 INFO L628 ElimStorePlain]: treesize reduction 148, result has 71.4 percent of original size [2021-02-19 17:44:08,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:08,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:08,544 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:44:08,545 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:08,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:08,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:08,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:44:08,551 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:08,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:08,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:08,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:08,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:44:08,567 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:08,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:08,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:08,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:44:08,573 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:08,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:08,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:08,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:08,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-02-19 17:44:08,589 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:08,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:08,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:08,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-02-19 17:44:08,595 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:08,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:08,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:08,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-02-19 17:44:08,602 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:08,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:08,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:08,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:08,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-02-19 17:44:08,624 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:08,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:08,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:08,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-02-19 17:44:08,631 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:08,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:08,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:08,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:44:08,636 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:08,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:08,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:08,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:44:08,652 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:08,780 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-02-19 17:44:08,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:08,783 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-02-19 17:44:08,783 INFO L247 ElimStorePlain]: Needed 22 recursive calls to eliminate 6 variables, input treesize:419, output treesize:179 [2021-02-19 17:44:08,980 WARN L202 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-02-19 17:44:09,050 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:09,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:44:09,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-02-19 17:44:09,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419576852] [2021-02-19 17:44:09,051 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:44:09,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:44:09,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:44:09,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:44:09,051 INFO L87 Difference]: Start difference. First operand 176 states and 516 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:44:09,502 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2021-02-19 17:44:09,867 WARN L202 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 102 [2021-02-19 17:44:10,155 WARN L202 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-02-19 17:44:10,396 WARN L202 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-02-19 17:44:10,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:44:10,451 INFO L93 Difference]: Finished difference Result 230 states and 669 transitions. [2021-02-19 17:44:10,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:44:10,452 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:44:10,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:44:10,453 INFO L225 Difference]: With dead ends: 230 [2021-02-19 17:44:10,453 INFO L226 Difference]: Without dead ends: 226 [2021-02-19 17:44:10,453 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 7 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:44:10,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-02-19 17:44:10,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 183. [2021-02-19 17:44:10,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.9505494505494507) internal successors, (537), 182 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:44:10,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 537 transitions. [2021-02-19 17:44:10,455 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 537 transitions. Word has length 17 [2021-02-19 17:44:10,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:44:10,455 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 537 transitions. [2021-02-19 17:44:10,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:44:10,456 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 537 transitions. [2021-02-19 17:44:10,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:44:10,456 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:44:10,456 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:44:10,664 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1149 [2021-02-19 17:44:10,664 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:44:10,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:44:10,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1716980165, now seen corresponding path program 30 times [2021-02-19 17:44:10,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:44:10,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879699572] [2021-02-19 17:44:10,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:44:10,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:44:10,876 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:10,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879699572] [2021-02-19 17:44:10,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600505724] [2021-02-19 17:44:10,876 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 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 [2021-02-19 17:44:10,895 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:44:10,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:44:10,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:44:10,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:44:11,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:11,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:11,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:44:11,174 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:11,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:11,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:44:11,179 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:11,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:11,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:11,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:11,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:44:11,270 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-02-19 17:44:11,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:11,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:44:11,275 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:11,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:11,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:11,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:11,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:44:11,368 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:11,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:11,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:44:11,373 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:11,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:11,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-02-19 17:44:11,462 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:223, output treesize:199 [2021-02-19 17:44:11,743 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_290, v_prenex_292, v_prenex_294, array_4, v_prenex_288], 1=[v_prenex_291, v_prenex_293, array_2, v_prenex_287, v_prenex_289]} [2021-02-19 17:44:11,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:44:11,752 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 17:44:11,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:44:11,759 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:12,070 WARN L202 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 78 [2021-02-19 17:44:12,070 INFO L628 ElimStorePlain]: treesize reduction 141, result has 63.2 percent of original size [2021-02-19 17:44:12,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-02-19 17:44:12,076 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:12,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17 [2021-02-19 17:44:12,082 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:12,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:44:12,088 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:12,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:44:12,093 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:12,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:12,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-02-19 17:44:12,173 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:12,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:12,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-02-19 17:44:12,251 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:12,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:12,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:44:12,327 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:12,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:12,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:12,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:12,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:44:12,403 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:12,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:12,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:12,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-02-19 17:44:12,409 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:12,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:12,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:12,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:44:12,415 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:12,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:12,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:44:12,420 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:12,487 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:12,487 INFO L518 ElimStorePlain]: Eliminatee v_prenex_293 vanished before elimination [2021-02-19 17:44:12,487 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:44:12,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:12,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:44:12,492 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:12,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:12,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:12,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:12,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-02-19 17:44:12,564 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:12,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:12,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:44:12,568 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:12,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:12,642 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:12,645 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 10 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-02-19 17:44:12,645 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 15 variables, input treesize:381, output treesize:76 [2021-02-19 17:44:12,715 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:12,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:44:12,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-02-19 17:44:12,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149720374] [2021-02-19 17:44:12,716 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:44:12,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:44:12,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:44:12,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:44:12,716 INFO L87 Difference]: Start difference. First operand 183 states and 537 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:44:13,106 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2021-02-19 17:44:13,440 WARN L202 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 71 [2021-02-19 17:44:13,589 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2021-02-19 17:44:13,817 WARN L202 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 92 [2021-02-19 17:44:14,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:44:14,021 INFO L93 Difference]: Finished difference Result 256 states and 723 transitions. [2021-02-19 17:44:14,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:44:14,022 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:44:14,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:44:14,023 INFO L225 Difference]: With dead ends: 256 [2021-02-19 17:44:14,023 INFO L226 Difference]: Without dead ends: 248 [2021-02-19 17:44:14,023 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:44:14,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-02-19 17:44:14,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 186. [2021-02-19 17:44:14,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.9675675675675675) internal successors, (549), 185 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:44:14,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 549 transitions. [2021-02-19 17:44:14,025 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 549 transitions. Word has length 17 [2021-02-19 17:44:14,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:44:14,026 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 549 transitions. [2021-02-19 17:44:14,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:44:14,026 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 549 transitions. [2021-02-19 17:44:14,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:44:14,026 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:44:14,026 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:44:14,226 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1188 [2021-02-19 17:44:14,226 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:44:14,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:44:14,227 INFO L82 PathProgramCache]: Analyzing trace with hash 2006532325, now seen corresponding path program 31 times [2021-02-19 17:44:14,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:44:14,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814648273] [2021-02-19 17:44:14,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:44:14,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:44:14,529 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:14,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814648273] [2021-02-19 17:44:14,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122183525] [2021-02-19 17:44:14,529 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 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 [2021-02-19 17:44:14,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:44:14,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:44:14,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:44:14,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:14,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:14,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:44:14,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:14,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:14,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:14,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:44:14,730 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:14,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:14,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:14,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:44:14,735 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:14,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:14,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-02-19 17:44:14,741 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-02-19 17:44:14,828 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:14,836 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-02-19 17:44:14,836 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:159, output treesize:219 [2021-02-19 17:44:15,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:15,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:15,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:44:15,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 17:44:15,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:15,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:44:15,184 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:15,586 WARN L202 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 128 [2021-02-19 17:44:15,587 INFO L628 ElimStorePlain]: treesize reduction 221, result has 63.6 percent of original size [2021-02-19 17:44:15,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:15,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-02-19 17:44:15,595 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:15,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:44:15,602 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:15,613 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:15,779 WARN L202 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-02-19 17:44:15,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:15,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-02-19 17:44:15,787 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:16,108 WARN L202 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 117 [2021-02-19 17:44:16,109 INFO L628 ElimStorePlain]: treesize reduction 5, result has 98.6 percent of original size [2021-02-19 17:44:16,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-02-19 17:44:16,116 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:16,282 WARN L202 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-02-19 17:44:16,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:16,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:16,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 38 [2021-02-19 17:44:16,290 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:16,445 WARN L202 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-02-19 17:44:16,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:16,446 INFO L518 ElimStorePlain]: Eliminatee v_prenex_301 vanished before elimination [2021-02-19 17:44:16,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-02-19 17:44:16,452 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:16,602 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-02-19 17:44:16,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:16,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:16,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:44:16,611 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 2 xjuncts. [2021-02-19 17:44:16,783 WARN L202 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-02-19 17:44:16,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:16,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:16,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:44:16,791 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:16,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:44:16,797 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:16,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:16,966 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-02-19 17:44:16,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:16,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:16,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:16,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-02-19 17:44:16,974 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:16,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:16,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:44:16,981 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:17,274 WARN L202 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 90 [2021-02-19 17:44:17,274 INFO L628 ElimStorePlain]: treesize reduction 11, result has 96.2 percent of original size [2021-02-19 17:44:17,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:17,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:44:17,281 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:17,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:44:17,287 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:17,431 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-02-19 17:44:17,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:17,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:17,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:17,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:44:17,438 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:17,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:17,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-02-19 17:44:17,444 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:17,698 WARN L202 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 78 [2021-02-19 17:44:17,699 INFO L628 ElimStorePlain]: treesize reduction 10, result has 96.0 percent of original size [2021-02-19 17:44:17,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:17,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:44:17,705 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:17,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:44:17,710 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:17,833 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-02-19 17:44:17,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:17,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:17,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:44:17,838 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:17,963 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-02-19 17:44:17,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:17,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 14 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-02-19 17:44:17,968 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 21 variables, input treesize:605, output treesize:155 [2021-02-19 17:44:18,159 WARN L202 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-02-19 17:44:18,240 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:18,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:44:18,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-02-19 17:44:18,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45781530] [2021-02-19 17:44:18,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:44:18,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:44:18,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:44:18,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:44:18,241 INFO L87 Difference]: Start difference. First operand 186 states and 549 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:44:18,875 WARN L202 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 96 [2021-02-19 17:44:19,215 WARN L202 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 100 [2021-02-19 17:44:19,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:44:19,272 INFO L93 Difference]: Finished difference Result 286 states and 821 transitions. [2021-02-19 17:44:19,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:44:19,273 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:44:19,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:44:19,274 INFO L225 Difference]: With dead ends: 286 [2021-02-19 17:44:19,274 INFO L226 Difference]: Without dead ends: 282 [2021-02-19 17:44:19,274 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:44:19,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-02-19 17:44:19,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 189. [2021-02-19 17:44:19,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.984042553191489) internal successors, (561), 188 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:44:19,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 561 transitions. [2021-02-19 17:44:19,277 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 561 transitions. Word has length 17 [2021-02-19 17:44:19,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:44:19,277 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 561 transitions. [2021-02-19 17:44:19,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:44:19,277 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 561 transitions. [2021-02-19 17:44:19,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:44:19,277 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:44:19,277 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:44:19,489 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1239 [2021-02-19 17:44:19,490 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:44:19,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:44:19,490 INFO L82 PathProgramCache]: Analyzing trace with hash 335556309, now seen corresponding path program 32 times [2021-02-19 17:44:19,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:44:19,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370694368] [2021-02-19 17:44:19,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:44:19,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:44:19,719 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:19,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370694368] [2021-02-19 17:44:19,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408901832] [2021-02-19 17:44:19,720 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 [2021-02-19 17:44:19,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:44:19,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:44:19,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:44:19,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:44:20,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:20,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:20,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:44:20,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:20,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:20,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:20,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:44:20,074 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:20,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:20,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:20,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:44:20,080 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:20,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:20,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:20,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:44:20,087 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:20,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:20,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:20,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:44:20,093 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-02-19 17:44:20,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:20,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:44:20,099 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:20,222 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-02-19 17:44:20,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:20,259 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 12 dim-0 vars, and 6 xjuncts. [2021-02-19 17:44:20,259 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:277, output treesize:253 [2021-02-19 17:44:20,636 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 92 [2021-02-19 17:44:20,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:20,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:20,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-02-19 17:44:20,991 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:20,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:21,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:44:21,002 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:21,331 WARN L202 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 116 [2021-02-19 17:44:21,332 INFO L628 ElimStorePlain]: treesize reduction 177, result has 61.4 percent of original size [2021-02-19 17:44:21,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-02-19 17:44:21,339 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:21,452 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-02-19 17:44:21,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:21,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-02-19 17:44:21,459 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:21,572 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-02-19 17:44:21,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:21,573 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-02-19 17:44:21,573 INFO L518 ElimStorePlain]: Eliminatee v_prenex_330 vanished before elimination [2021-02-19 17:44:21,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:21,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:21,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:44:21,581 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:21,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:21,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:44:21,588 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:21,693 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-02-19 17:44:21,693 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:21,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:21,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:21,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:44:21,701 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:21,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:21,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:44:21,708 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:21,817 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-02-19 17:44:21,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:21,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:21,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:44:21,824 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:21,930 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-02-19 17:44:21,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:21,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:21,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:44:21,937 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:22,039 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-02-19 17:44:22,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:22,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:22,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:44:22,046 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 2 xjuncts. [2021-02-19 17:44:22,155 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-02-19 17:44:22,155 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:22,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:22,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:22,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:44:22,162 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:22,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:22,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-02-19 17:44:22,168 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:22,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:22,286 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-02-19 17:44:22,286 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:22,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:22,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:22,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:44:22,293 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:22,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:22,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-02-19 17:44:22,299 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:22,405 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-02-19 17:44:22,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:22,409 INFO L550 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 12 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-02-19 17:44:22,409 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 24 variables, input treesize:471, output treesize:62 [2021-02-19 17:44:22,473 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:22,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:44:22,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-02-19 17:44:22,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480615581] [2021-02-19 17:44:22,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:44:22,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:44:22,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:44:22,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:44:22,474 INFO L87 Difference]: Start difference. First operand 189 states and 561 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:44:23,367 WARN L202 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 122 [2021-02-19 17:44:23,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:44:23,625 INFO L93 Difference]: Finished difference Result 262 states and 742 transitions. [2021-02-19 17:44:23,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:44:23,626 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:44:23,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:44:23,627 INFO L225 Difference]: With dead ends: 262 [2021-02-19 17:44:23,627 INFO L226 Difference]: Without dead ends: 258 [2021-02-19 17:44:23,627 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:44:23,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-02-19 17:44:23,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 187. [2021-02-19 17:44:23,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.989247311827957) internal successors, (556), 186 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:44:23,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 556 transitions. [2021-02-19 17:44:23,630 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 556 transitions. Word has length 17 [2021-02-19 17:44:23,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:44:23,630 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 556 transitions. [2021-02-19 17:44:23,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:44:23,630 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 556 transitions. [2021-02-19 17:44:23,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:44:23,630 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:44:23,630 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:44:23,837 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1271,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:44:23,838 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:44:23,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:44:23,838 INFO L82 PathProgramCache]: Analyzing trace with hash -150319609, now seen corresponding path program 33 times [2021-02-19 17:44:23,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:44:23,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8797990] [2021-02-19 17:44:23,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:44:23,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:44:24,132 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:24,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8797990] [2021-02-19 17:44:24,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476894614] [2021-02-19 17:44:24,132 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 [2021-02-19 17:44:24,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 17:44:24,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:44:24,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:44:24,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:44:24,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:24,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:24,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:44:24,455 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:24,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:24,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:44:24,460 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:24,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:24,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:24,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:24,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:44:24,551 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:24,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:24,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:44:24,556 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:24,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:24,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:24,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:24,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:44:24,641 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:24,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:24,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:44:24,647 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-02-19 17:44:24,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:24,736 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-02-19 17:44:24,736 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:199, output treesize:175 [2021-02-19 17:44:25,080 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_351, array_4, v_prenex_353, v_prenex_355, v_prenex_357], 1=[array_2, v_prenex_350, v_prenex_352, v_prenex_354, v_prenex_356]} [2021-02-19 17:44:25,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:44:25,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:25,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17 [2021-02-19 17:44:25,101 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:25,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:44:25,109 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:25,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-02-19 17:44:25,117 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:25,336 WARN L202 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 77 [2021-02-19 17:44:25,337 INFO L628 ElimStorePlain]: treesize reduction 144, result has 58.3 percent of original size [2021-02-19 17:44:25,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-02-19 17:44:25,343 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:25,416 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:25,420 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 19 treesize of output 15 [2021-02-19 17:44:25,421 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:25,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:25,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-02-19 17:44:25,507 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:25,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:25,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:44:25,582 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-02-19 17:44:25,657 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:25,657 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:44:25,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:25,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:25,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:44:25,664 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:25,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:25,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:25,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:44:25,670 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:25,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:25,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:25,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:44:25,676 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:25,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:25,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-02-19 17:44:25,682 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:25,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:25,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:25,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:44:25,758 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:25,828 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:25,828 INFO L518 ElimStorePlain]: Eliminatee v_prenex_354 vanished before elimination [2021-02-19 17:44:25,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:25,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:25,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:44:25,835 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:25,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:25,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-02-19 17:44:25,841 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:25,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:25,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:25,923 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 10 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-02-19 17:44:25,923 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 15 variables, input treesize:373, output treesize:71 [2021-02-19 17:44:25,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:25,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:44:25,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-02-19 17:44:25,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719803306] [2021-02-19 17:44:25,996 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:44:25,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:44:25,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:44:25,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:44:25,996 INFO L87 Difference]: Start difference. First operand 187 states and 556 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:44:26,638 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2021-02-19 17:44:26,890 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 90 [2021-02-19 17:44:27,184 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 71 [2021-02-19 17:44:27,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:44:27,345 INFO L93 Difference]: Finished difference Result 253 states and 717 transitions. [2021-02-19 17:44:27,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:44:27,346 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:44:27,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:44:27,347 INFO L225 Difference]: With dead ends: 253 [2021-02-19 17:44:27,347 INFO L226 Difference]: Without dead ends: 245 [2021-02-19 17:44:27,347 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:44:27,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-02-19 17:44:27,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 184. [2021-02-19 17:44:27,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.989071038251366) internal successors, (547), 183 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:44:27,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 547 transitions. [2021-02-19 17:44:27,349 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 547 transitions. Word has length 17 [2021-02-19 17:44:27,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:44:27,350 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 547 transitions. [2021-02-19 17:44:27,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:44:27,350 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 547 transitions. [2021-02-19 17:44:27,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:44:27,350 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:44:27,350 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:44:27,550 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1347 [2021-02-19 17:44:27,550 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:44:27,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:44:27,550 INFO L82 PathProgramCache]: Analyzing trace with hash -669258895, now seen corresponding path program 34 times [2021-02-19 17:44:27,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:44:27,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312592655] [2021-02-19 17:44:27,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:44:27,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:44:27,904 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:27,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312592655] [2021-02-19 17:44:27,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239548613] [2021-02-19 17:44:27,904 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 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 [2021-02-19 17:44:27,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:44:27,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:44:27,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:44:27,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:44:28,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:28,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:28,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:44:28,018 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:28,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:28,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:28,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:44:28,024 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:28,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:28,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:28,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:44:28,029 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:28,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:28,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:44:28,033 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-02-19 17:44:28,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:28,092 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-02-19 17:44:28,092 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:143, output treesize:133 [2021-02-19 17:44:28,398 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 62 [2021-02-19 17:44:28,736 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_371, array_4, v_prenex_373, v_prenex_375, v_prenex_367, v_prenex_369], 1=[v_prenex_370, array_2, v_prenex_372, v_prenex_374, v_prenex_366, v_prenex_368]} [2021-02-19 17:44:28,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:44:28,744 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 17:44:28,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:44:28,751 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:29,101 WARN L202 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 90 [2021-02-19 17:44:29,102 INFO L628 ElimStorePlain]: treesize reduction 134, result has 63.7 percent of original size [2021-02-19 17:44:29,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-02-19 17:44:29,109 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:29,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:44:29,116 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:29,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:29,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-02-19 17:44:29,215 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:29,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:29,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:44:29,309 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:29,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17 [2021-02-19 17:44:29,315 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:29,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:29,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-02-19 17:44:29,403 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:29,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:29,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:44:29,490 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:29,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:29,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:29,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:29,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-02-19 17:44:29,576 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:29,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:29,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:44:29,582 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:29,594 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:29,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:29,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:29,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:29,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-02-19 17:44:29,677 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:29,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:29,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:44:29,683 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:29,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:29,757 INFO L518 ElimStorePlain]: Eliminatee v_prenex_372 vanished before elimination [2021-02-19 17:44:29,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:29,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:29,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:44:29,764 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:29,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:29,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:44:29,769 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:29,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:29,844 INFO L518 ElimStorePlain]: Eliminatee v_prenex_366 vanished before elimination [2021-02-19 17:44:29,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:29,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:44:29,850 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:29,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:29,926 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-02-19 17:44:29,926 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 18 variables, input treesize:367, output treesize:67 [2021-02-19 17:44:30,002 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:30,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:44:30,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-02-19 17:44:30,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655751034] [2021-02-19 17:44:30,002 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:44:30,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:44:30,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:44:30,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:44:30,003 INFO L87 Difference]: Start difference. First operand 184 states and 547 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:44:30,552 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-02-19 17:44:30,924 WARN L202 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 92 [2021-02-19 17:44:31,121 WARN L202 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2021-02-19 17:44:32,008 WARN L202 SmtUtils]: Spent 804.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 129 [2021-02-19 17:44:32,401 WARN L202 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 103 [2021-02-19 17:44:32,609 WARN L202 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-02-19 17:44:33,042 WARN L202 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 107 [2021-02-19 17:44:33,425 WARN L202 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 99 [2021-02-19 17:44:33,803 WARN L202 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 107 [2021-02-19 17:44:34,013 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2021-02-19 17:44:34,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:44:34,156 INFO L93 Difference]: Finished difference Result 338 states and 939 transitions. [2021-02-19 17:44:34,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:44:34,157 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:44:34,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:44:34,158 INFO L225 Difference]: With dead ends: 338 [2021-02-19 17:44:34,158 INFO L226 Difference]: Without dead ends: 330 [2021-02-19 17:44:34,158 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:44:34,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-02-19 17:44:34,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 177. [2021-02-19 17:44:34,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.9488636363636362) internal successors, (519), 176 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:44:34,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 519 transitions. [2021-02-19 17:44:34,161 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 519 transitions. Word has length 17 [2021-02-19 17:44:34,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:44:34,161 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 519 transitions. [2021-02-19 17:44:34,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:44:34,161 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 519 transitions. [2021-02-19 17:44:34,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:44:34,161 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:44:34,161 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:44:34,361 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1398 [2021-02-19 17:44:34,361 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:44:34,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:44:34,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1965452615, now seen corresponding path program 35 times [2021-02-19 17:44:34,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:44:34,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403888812] [2021-02-19 17:44:34,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:44:34,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:44:34,723 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:34,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403888812] [2021-02-19 17:44:34,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121789952] [2021-02-19 17:44:34,723 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 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 [2021-02-19 17:44:34,744 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:44:34,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:44:34,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:44:34,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:44:34,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:34,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:34,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:44:35,000 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:35,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:35,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:44:35,006 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:35,073 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:35,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:35,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:35,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:44:35,080 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:35,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:35,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:44:35,086 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-02-19 17:44:35,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:35,158 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-02-19 17:44:35,158 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:155, output treesize:143 [2021-02-19 17:44:35,486 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 10=[array_0]} [2021-02-19 17:44:35,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:35,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:44:35,493 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:35,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:35,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:44:35,499 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:35,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:35,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:44:35,506 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-02-19 17:44:35,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:35,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:44:35,513 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:35,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:35,518 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-02-19 17:44:35,520 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-02-19 17:44:35,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:35,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-02-19 17:44:35,527 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 4 xjuncts. [2021-02-19 17:44:35,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:35,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:44:35,535 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-02-19 17:44:35,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:35,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-02-19 17:44:35,542 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:35,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:35,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:44:35,550 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:35,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:44:35,556 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:35,934 WARN L202 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 75 [2021-02-19 17:44:35,935 INFO L628 ElimStorePlain]: treesize reduction 160, result has 69.1 percent of original size [2021-02-19 17:44:35,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:35,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:35,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:44:35,942 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:35,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:35,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:35,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:44:35,949 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:35,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:35,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:35,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:35,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-02-19 17:44:35,968 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:35,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:35,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:35,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-02-19 17:44:35,975 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:35,996 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:36,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:36,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:36,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:44:36,004 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:36,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:36,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:36,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:44:36,011 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:36,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:36,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:36,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:36,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-02-19 17:44:36,034 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:36,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:36,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:36,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-02-19 17:44:36,041 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:36,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:36,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:36,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:44:36,047 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:36,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:36,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:36,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-02-19 17:44:36,054 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:36,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:36,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:44:36,060 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:36,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:36,221 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-02-19 17:44:36,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:36,224 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-02-19 17:44:36,224 INFO L247 ElimStorePlain]: Needed 22 recursive calls to eliminate 6 variables, input treesize:419, output treesize:179 [2021-02-19 17:44:36,447 WARN L202 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-02-19 17:44:36,526 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:36,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:44:36,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-02-19 17:44:36,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342638838] [2021-02-19 17:44:36,526 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:44:36,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:44:36,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:44:36,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:44:36,527 INFO L87 Difference]: Start difference. First operand 177 states and 519 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:44:37,071 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-02-19 17:44:37,393 WARN L202 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-02-19 17:44:37,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:44:37,471 INFO L93 Difference]: Finished difference Result 207 states and 602 transitions. [2021-02-19 17:44:37,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 17:44:37,472 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:44:37,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:44:37,472 INFO L225 Difference]: With dead ends: 207 [2021-02-19 17:44:37,472 INFO L226 Difference]: Without dead ends: 203 [2021-02-19 17:44:37,472 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:44:37,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-02-19 17:44:37,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 181. [2021-02-19 17:44:37,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.95) internal successors, (531), 180 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:44:37,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 531 transitions. [2021-02-19 17:44:37,474 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 531 transitions. Word has length 17 [2021-02-19 17:44:37,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:44:37,475 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 531 transitions. [2021-02-19 17:44:37,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:44:37,475 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 531 transitions. [2021-02-19 17:44:37,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:44:37,475 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:44:37,475 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:44:37,675 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1435,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:44:37,675 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:44:37,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:44:37,675 INFO L82 PathProgramCache]: Analyzing trace with hash -848276811, now seen corresponding path program 36 times [2021-02-19 17:44:37,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:44:37,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883966930] [2021-02-19 17:44:37,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:44:37,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:44:37,951 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:37,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883966930] [2021-02-19 17:44:37,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832123390] [2021-02-19 17:44:37,951 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 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 [2021-02-19 17:44:37,971 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:44:37,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:44:37,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:44:37,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:44:38,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:38,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:38,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:44:38,257 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 17:44:38,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:38,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:44:38,263 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:38,370 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-02-19 17:44:38,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:38,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:38,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:38,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:44:38,377 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:38,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:38,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:44:38,383 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:38,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:38,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:38,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:38,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:44:38,490 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:38,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:38,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:44:38,496 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:38,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:38,598 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-02-19 17:44:38,598 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:223, output treesize:199 [2021-02-19 17:44:38,755 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 71 [2021-02-19 17:44:39,190 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_404, v_prenex_407, v_prenex_392, v_prenex_409, v_prenex_395, array_4, v_prenex_397, v_prenex_399, v_prenex_401, v_prenex_412], 1=[v_prenex_406, v_prenex_391, v_prenex_408, array_2, v_prenex_394, v_prenex_396, v_prenex_398, v_prenex_400, v_prenex_411, v_prenex_403]} [2021-02-19 17:44:39,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:44:39,198 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:39,445 WARN L202 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 105 [2021-02-19 17:44:39,446 INFO L628 ElimStorePlain]: treesize reduction 122, result has 69.3 percent of original size [2021-02-19 17:44:39,446 INFO L518 ElimStorePlain]: Eliminatee v_prenex_407 vanished before elimination [2021-02-19 17:44:39,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:44:39,453 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-02-19 17:44:39,576 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-02-19 17:44:39,577 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:39,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-02-19 17:44:39,585 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:39,708 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-02-19 17:44:39,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:39,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-02-19 17:44:39,715 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:39,838 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-02-19 17:44:39,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:39,839 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-02-19 17:44:39,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:44:39,845 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-02-19 17:44:39,974 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-02-19 17:44:39,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:39,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-02-19 17:44:39,981 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-02-19 17:44:39,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-02-19 17:44:39,988 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-02-19 17:44:40,137 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-02-19 17:44:40,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:40,138 INFO L518 ElimStorePlain]: Eliminatee v_prenex_401 vanished before elimination [2021-02-19 17:44:40,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:44:40,145 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:40,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:44:40,151 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:40,290 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-02-19 17:44:40,290 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:40,290 INFO L518 ElimStorePlain]: Eliminatee v_prenex_406 vanished before elimination [2021-02-19 17:44:40,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:40,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:40,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-02-19 17:44:40,298 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:40,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:40,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:44:40,305 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:40,318 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:40,453 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-02-19 17:44:40,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:40,453 INFO L518 ElimStorePlain]: Eliminatee v_prenex_408 vanished before elimination [2021-02-19 17:44:40,453 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:44:40,453 INFO L518 ElimStorePlain]: Eliminatee v_prenex_394 vanished before elimination [2021-02-19 17:44:40,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:40,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:40,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:44:40,461 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:40,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:40,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:44:40,468 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:40,480 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:40,612 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-02-19 17:44:40,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:40,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:40,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:40,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 15 [2021-02-19 17:44:40,620 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:40,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:40,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:40,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-02-19 17:44:40,627 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:40,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:40,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:40,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:40,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-02-19 17:44:40,655 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:40,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:40,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:44:40,661 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:40,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:40,800 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-02-19 17:44:40,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:40,801 INFO L518 ElimStorePlain]: Eliminatee v_prenex_400 vanished before elimination [2021-02-19 17:44:40,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:40,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:40,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:44:40,809 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:40,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:40,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:44:40,815 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:40,939 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-02-19 17:44:40,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:40,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:40,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-02-19 17:44:40,946 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:41,068 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-02-19 17:44:41,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:41,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 10 dim-0 vars, 20 dim-1 vars, End of recursive call: and 12 xjuncts. [2021-02-19 17:44:41,073 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 30 variables, input treesize:405, output treesize:126 [2021-02-19 17:44:41,161 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:41,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:44:41,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-02-19 17:44:41,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425651216] [2021-02-19 17:44:41,161 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:44:41,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:44:41,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:44:41,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:44:41,162 INFO L87 Difference]: Start difference. First operand 181 states and 531 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:44:41,689 WARN L202 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2021-02-19 17:44:41,945 WARN L202 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 92 [2021-02-19 17:44:42,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:44:42,150 INFO L93 Difference]: Finished difference Result 231 states and 651 transitions. [2021-02-19 17:44:42,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:44:42,151 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:44:42,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:44:42,152 INFO L225 Difference]: With dead ends: 231 [2021-02-19 17:44:42,152 INFO L226 Difference]: Without dead ends: 223 [2021-02-19 17:44:42,152 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:44:42,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-02-19 17:44:42,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 182. [2021-02-19 17:44:42,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.972375690607735) internal successors, (538), 181 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:44:42,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 538 transitions. [2021-02-19 17:44:42,154 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 538 transitions. Word has length 17 [2021-02-19 17:44:42,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:44:42,155 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 538 transitions. [2021-02-19 17:44:42,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:44:42,155 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 538 transitions. [2021-02-19 17:44:42,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:44:42,155 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:44:42,155 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:44:42,361 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1472,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:44:42,362 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:44:42,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:44:42,362 INFO L82 PathProgramCache]: Analyzing trace with hash -750550903, now seen corresponding path program 37 times [2021-02-19 17:44:42,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:44:42,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556910812] [2021-02-19 17:44:42,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:44:42,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:44:42,700 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:42,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556910812] [2021-02-19 17:44:42,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012837828] [2021-02-19 17:44:42,700 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 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 [2021-02-19 17:44:42,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:44:42,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:44:42,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:44:42,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:42,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:42,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:44:42,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 17:44:42,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:42,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:42,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:44:42,854 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:42,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:42,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:42,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:44:42,861 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:42,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:42,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:44:42,867 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:42,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:42,934 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-02-19 17:44:42,934 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:149, output treesize:139 [2021-02-19 17:44:43,275 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 65 [2021-02-19 17:44:43,523 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_427, array_4, v_prenex_430, v_prenex_432, v_prenex_434, v_prenex_425], 1=[v_prenex_426, v_prenex_429, array_2, v_prenex_431, v_prenex_433, v_prenex_424]} [2021-02-19 17:44:43,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:44:43,530 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:43,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-02-19 17:44:43,538 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:43,752 WARN L202 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 88 [2021-02-19 17:44:43,753 INFO L628 ElimStorePlain]: treesize reduction 141, result has 59.8 percent of original size [2021-02-19 17:44:43,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:44:43,760 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:43,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17 [2021-02-19 17:44:43,768 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:43,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:43,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-02-19 17:44:43,858 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:43,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:43,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-02-19 17:44:43,943 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:44,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:44,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:44:44,025 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:44,127 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-02-19 17:44:44,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:44,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:44:44,135 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-02-19 17:44:44,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:44,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:44,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:44,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:44:44,240 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:44,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:44,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-02-19 17:44:44,246 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:44,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:44,332 INFO L518 ElimStorePlain]: Eliminatee v_prenex_429 vanished before elimination [2021-02-19 17:44:44,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:44,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:44,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:44:44,338 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:44,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:44,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:44:44,344 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:44,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:44,421 INFO L518 ElimStorePlain]: Eliminatee v_prenex_431 vanished before elimination [2021-02-19 17:44:44,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:44,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:44:44,427 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:44,502 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:44,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:44,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:44,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:44:44,508 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:44,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:44,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-02-19 17:44:44,513 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:44,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:44,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:44,603 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-02-19 17:44:44,603 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 18 variables, input treesize:364, output treesize:62 [2021-02-19 17:44:44,669 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:44,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:44:44,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-02-19 17:44:44,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913191878] [2021-02-19 17:44:44,669 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:44:44,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:44:44,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:44:44,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:44:44,670 INFO L87 Difference]: Start difference. First operand 182 states and 538 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:44:45,250 WARN L202 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-02-19 17:44:45,535 WARN L202 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 82 [2021-02-19 17:44:45,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:44:45,684 INFO L93 Difference]: Finished difference Result 227 states and 640 transitions. [2021-02-19 17:44:45,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:44:45,687 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:44:45,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:44:45,688 INFO L225 Difference]: With dead ends: 227 [2021-02-19 17:44:45,688 INFO L226 Difference]: Without dead ends: 219 [2021-02-19 17:44:45,688 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:44:45,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-02-19 17:44:45,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 178. [2021-02-19 17:44:45,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.9491525423728815) internal successors, (522), 177 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:44:45,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 522 transitions. [2021-02-19 17:44:45,690 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 522 transitions. Word has length 17 [2021-02-19 17:44:45,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:44:45,690 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 522 transitions. [2021-02-19 17:44:45,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:44:45,691 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 522 transitions. [2021-02-19 17:44:45,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:44:45,691 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:44:45,691 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:44:45,905 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1547,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:44:45,905 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:44:45,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:44:45,905 INFO L82 PathProgramCache]: Analyzing trace with hash -299360401, now seen corresponding path program 38 times [2021-02-19 17:44:45,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:44:45,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880703446] [2021-02-19 17:44:45,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:44:45,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:44:46,068 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2021-02-19 17:44:46,282 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:46,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880703446] [2021-02-19 17:44:46,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609402503] [2021-02-19 17:44:46,282 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 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 [2021-02-19 17:44:46,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:44:46,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:44:46,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:44:46,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:44:46,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:46,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:46,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-02-19 17:44:46,411 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-02-19 17:44:46,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:46,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:46,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:44:46,418 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:46,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:46,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:46,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:44:46,424 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:46,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:46,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:44:46,429 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:46,531 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-02-19 17:44:46,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:46,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-02-19 17:44:46,533 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:177, output treesize:233 [2021-02-19 17:44:46,660 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-02-19 17:44:46,876 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2021-02-19 17:44:47,130 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 15=[array_0]} [2021-02-19 17:44:47,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:47,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:47,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:44:47,138 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:47,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:47,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:47,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:44:47,145 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:47,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:47,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:47,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:44:47,152 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-02-19 17:44:47,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:47,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:47,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-02-19 17:44:47,160 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:47,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:47,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:47,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:44:47,168 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:47,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:47,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:47,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:44:47,176 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-02-19 17:44:47,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:47,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:47,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:44:47,184 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:47,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:47,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:47,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-02-19 17:44:47,193 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:47,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:47,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:47,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:44:47,201 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:47,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:47,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:44:47,208 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:47,424 WARN L202 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 63 [2021-02-19 17:44:47,425 INFO L628 ElimStorePlain]: treesize reduction 124, result has 63.5 percent of original size [2021-02-19 17:44:47,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:47,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:47,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-02-19 17:44:47,432 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:47,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:47,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:47,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:44:47,438 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:47,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:47,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:47,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:44:47,445 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:47,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:47,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:47,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:44:47,451 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:47,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:47,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:47,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:47,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:44:47,470 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:47,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:47,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:47,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:44:47,476 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:47,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:47,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:47,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:44:47,493 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:47,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:47,583 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-02-19 17:44:47,583 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 8 variables, input treesize:375, output treesize:62 [2021-02-19 17:44:47,652 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:47,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:44:47,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-02-19 17:44:47,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242965881] [2021-02-19 17:44:47,653 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:44:47,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:44:47,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:44:47,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:44:47,653 INFO L87 Difference]: Start difference. First operand 178 states and 522 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:44:48,158 WARN L202 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2021-02-19 17:44:48,658 WARN L202 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 110 [2021-02-19 17:44:48,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:44:48,798 INFO L93 Difference]: Finished difference Result 202 states and 583 transitions. [2021-02-19 17:44:48,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:44:48,799 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:44:48,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:44:48,799 INFO L225 Difference]: With dead ends: 202 [2021-02-19 17:44:48,799 INFO L226 Difference]: Without dead ends: 198 [2021-02-19 17:44:48,799 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:44:48,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-02-19 17:44:48,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 182. [2021-02-19 17:44:48,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.9613259668508287) internal successors, (536), 181 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:44:48,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 536 transitions. [2021-02-19 17:44:48,802 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 536 transitions. Word has length 17 [2021-02-19 17:44:48,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:44:48,802 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 536 transitions. [2021-02-19 17:44:48,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:44:48,802 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 536 transitions. [2021-02-19 17:44:48,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:44:48,802 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:44:48,802 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:44:49,002 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1583 [2021-02-19 17:44:49,003 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:44:49,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:44:49,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1825269825, now seen corresponding path program 39 times [2021-02-19 17:44:49,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:44:49,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291305019] [2021-02-19 17:44:49,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:44:49,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:44:49,288 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2021-02-19 17:44:49,452 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:49,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291305019] [2021-02-19 17:44:49,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169119868] [2021-02-19 17:44:49,453 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 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 [2021-02-19 17:44:49,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 17:44:49,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:44:49,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:44:49,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:44:49,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:49,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:49,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:44:49,588 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:49,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:49,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:49,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:44:49,593 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:49,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:49,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:49,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:44:49,599 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:49,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:49,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-02-19 17:44:49,604 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-02-19 17:44:49,692 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:49,694 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-02-19 17:44:49,694 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:165, output treesize:221 [2021-02-19 17:44:49,843 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_449, array_4, v_prenex_445, v_prenex_447], 1=[v_prenex_448, array_0, v_prenex_444, v_prenex_446]} [2021-02-19 17:44:49,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:44:49,849 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 17:44:49,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:44:49,865 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:50,206 WARN L202 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2021-02-19 17:44:50,206 INFO L628 ElimStorePlain]: treesize reduction 216, result has 62.2 percent of original size [2021-02-19 17:44:50,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:44:50,212 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-02-19 17:44:50,375 WARN L202 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-02-19 17:44:50,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:50,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-02-19 17:44:50,381 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:50,539 WARN L202 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-02-19 17:44:50,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:50,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-02-19 17:44:50,545 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:50,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-02-19 17:44:50,551 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:50,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-02-19 17:44:50,557 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:50,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-02-19 17:44:50,563 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:50,568 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 17:44:50,569 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:50,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:44:50,574 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:50,822 WARN L202 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 61 [2021-02-19 17:44:50,822 INFO L628 ElimStorePlain]: treesize reduction 22, result has 92.5 percent of original size [2021-02-19 17:44:50,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:50,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:50,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:44:50,829 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:50,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:50,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:44:50,835 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:50,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:50,964 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-02-19 17:44:50,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:50,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:50,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:50,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:44:50,971 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:50,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:50,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:44:50,976 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:50,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:51,100 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-02-19 17:44:51,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:51,101 INFO L518 ElimStorePlain]: Eliminatee v_prenex_444 vanished before elimination [2021-02-19 17:44:51,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:51,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:51,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-02-19 17:44:51,107 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:51,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:51,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:51,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:44:51,113 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:51,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:51,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:51,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:44:51,119 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:51,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:51,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:51,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 15 [2021-02-19 17:44:51,126 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:51,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:51,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:44:51,131 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:51,232 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-02-19 17:44:51,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:51,234 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-02-19 17:44:51,234 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 8 variables, input treesize:567, output treesize:165 [2021-02-19 17:44:51,359 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-02-19 17:44:51,453 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:51,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:44:51,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-02-19 17:44:51,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084372625] [2021-02-19 17:44:51,453 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:44:51,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:44:51,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:44:51,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:44:51,454 INFO L87 Difference]: Start difference. First operand 182 states and 536 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:44:52,082 WARN L202 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2021-02-19 17:44:52,458 WARN L202 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 84 [2021-02-19 17:44:52,752 WARN L202 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-02-19 17:44:53,057 WARN L202 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-02-19 17:44:53,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:44:53,206 INFO L93 Difference]: Finished difference Result 216 states and 625 transitions. [2021-02-19 17:44:53,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:44:53,207 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:44:53,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:44:53,207 INFO L225 Difference]: With dead ends: 216 [2021-02-19 17:44:53,207 INFO L226 Difference]: Without dead ends: 212 [2021-02-19 17:44:53,208 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:44:53,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-02-19 17:44:53,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 180. [2021-02-19 17:44:53,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.9497206703910615) internal successors, (528), 179 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:44:53,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 528 transitions. [2021-02-19 17:44:53,210 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 528 transitions. Word has length 17 [2021-02-19 17:44:53,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:44:53,210 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 528 transitions. [2021-02-19 17:44:53,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:44:53,210 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 528 transitions. [2021-02-19 17:44:53,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:44:53,210 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:44:53,210 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:44:53,411 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1599 [2021-02-19 17:44:53,411 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:44:53,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:44:53,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1114166555, now seen corresponding path program 40 times [2021-02-19 17:44:53,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:44:53,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479008037] [2021-02-19 17:44:53,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:44:53,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:44:53,822 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:53,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479008037] [2021-02-19 17:44:53,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326625530] [2021-02-19 17:44:53,823 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 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 [2021-02-19 17:44:53,844 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:44:53,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:44:53,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:44:53,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:44:53,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:44:53,978 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:53,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:44:53,983 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:54,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:54,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:44:54,057 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:54,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:44:54,061 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-02-19 17:44:54,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:54,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-02-19 17:44:54,128 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:168, output treesize:158 [2021-02-19 17:44:54,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:54,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:54,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-02-19 17:44:54,261 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 17:44:54,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:54,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:54,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-02-19 17:44:54,269 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-02-19 17:44:54,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:54,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:54,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:44:54,277 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:54,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:54,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:54,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:44:54,285 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:54,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:54,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:54,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-02-19 17:44:54,294 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 4 xjuncts. [2021-02-19 17:44:54,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:54,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:54,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:44:54,302 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:54,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:54,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:54,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-02-19 17:44:54,311 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-02-19 17:44:54,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:54,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:54,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:44:54,318 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:54,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:54,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:54,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:44:54,326 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:54,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:54,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:44:54,334 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:54,624 WARN L202 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 47 [2021-02-19 17:44:54,625 INFO L628 ElimStorePlain]: treesize reduction 375, result has 39.3 percent of original size [2021-02-19 17:44:54,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:54,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:54,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:44:54,631 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:54,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:54,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:54,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:44:54,637 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:54,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:54,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:54,642 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:44:54,643 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:54,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:54,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:54,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:54,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:44:54,661 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:54,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:54,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:54,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:44:54,667 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:54,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:54,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:54,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:54,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:44:54,689 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:54,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:54,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:44:54,694 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:54,795 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-02-19 17:44:54,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:54,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-02-19 17:44:54,797 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 2 variables, input treesize:455, output treesize:164 [2021-02-19 17:44:54,923 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-02-19 17:44:55,060 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:55,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:44:55,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-02-19 17:44:55,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108918059] [2021-02-19 17:44:55,060 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:44:55,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:44:55,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:44:55,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:44:55,061 INFO L87 Difference]: Start difference. First operand 180 states and 528 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:44:55,745 WARN L202 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2021-02-19 17:44:55,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:44:55,864 INFO L93 Difference]: Finished difference Result 203 states and 591 transitions. [2021-02-19 17:44:55,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 17:44:55,865 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:44:55,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:44:55,865 INFO L225 Difference]: With dead ends: 203 [2021-02-19 17:44:55,865 INFO L226 Difference]: Without dead ends: 199 [2021-02-19 17:44:55,866 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:44:55,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-02-19 17:44:55,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 178. [2021-02-19 17:44:55,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.9491525423728815) internal successors, (522), 177 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:44:55,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 522 transitions. [2021-02-19 17:44:55,868 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 522 transitions. Word has length 17 [2021-02-19 17:44:55,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:44:55,868 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 522 transitions. [2021-02-19 17:44:55,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:44:55,868 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 522 transitions. [2021-02-19 17:44:55,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:44:55,868 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:44:55,868 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:44:56,068 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1615,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:44:56,069 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:44:56,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:44:56,069 INFO L82 PathProgramCache]: Analyzing trace with hash -92267419, now seen corresponding path program 41 times [2021-02-19 17:44:56,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:44:56,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786870446] [2021-02-19 17:44:56,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:44:56,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:44:56,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:56,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786870446] [2021-02-19 17:44:56,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746029376] [2021-02-19 17:44:56,321 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 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 [2021-02-19 17:44:56,341 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:44:56,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:44:56,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:44:56,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:44:56,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:56,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:56,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:44:56,527 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:56,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:56,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:56,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:44:56,534 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:56,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:56,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:56,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:44:56,540 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:56,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:56,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:44:56,546 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-02-19 17:44:56,648 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-02-19 17:44:56,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:56,657 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-02-19 17:44:56,657 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:215, output treesize:205 [2021-02-19 17:44:57,098 WARN L202 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 85 [2021-02-19 17:44:57,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:57,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:57,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:44:57,499 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:57,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:57,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:44:57,509 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-02-19 17:44:57,859 WARN L202 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 116 [2021-02-19 17:44:57,860 INFO L628 ElimStorePlain]: treesize reduction 191, result has 60.0 percent of original size [2021-02-19 17:44:57,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:57,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:44:57,868 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-02-19 17:44:58,021 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-02-19 17:44:58,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:58,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-02-19 17:44:58,029 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:58,176 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-02-19 17:44:58,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:58,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:58,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:58,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:44:58,185 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:58,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:58,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:44:58,193 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:58,338 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-02-19 17:44:58,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:58,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:58,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:44:58,346 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:58,485 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-02-19 17:44:58,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:58,485 INFO L518 ElimStorePlain]: Eliminatee v_prenex_472 vanished before elimination [2021-02-19 17:44:58,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:58,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:58,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:44:58,494 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:58,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:58,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:44:58,501 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:58,636 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-02-19 17:44:58,636 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:58,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-02-19 17:44:58,644 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:58,777 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-02-19 17:44:58,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:58,778 INFO L518 ElimStorePlain]: Eliminatee v_prenex_464 vanished before elimination [2021-02-19 17:44:58,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:58,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:58,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-02-19 17:44:58,786 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:58,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:58,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:44:58,794 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:58,914 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-02-19 17:44:58,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:58,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:58,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:58,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-02-19 17:44:58,923 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:58,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:58,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:44:58,930 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:59,047 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-02-19 17:44:59,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:59,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:59,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:59,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-02-19 17:44:59,056 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:59,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:44:59,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:44:59,062 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 17:44:59,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:59,197 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-02-19 17:44:59,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:44:59,202 INFO L550 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 12 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-02-19 17:44:59,202 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 24 variables, input treesize:474, output treesize:66 [2021-02-19 17:44:59,279 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:44:59,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:44:59,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-02-19 17:44:59,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233189977] [2021-02-19 17:44:59,279 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:44:59,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:44:59,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:44:59,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:44:59,280 INFO L87 Difference]: Start difference. First operand 178 states and 522 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:44:59,861 WARN L202 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 85 [2021-02-19 17:45:00,363 WARN L202 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 127 [2021-02-19 17:45:00,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:00,566 INFO L93 Difference]: Finished difference Result 201 states and 581 transitions. [2021-02-19 17:45:00,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:45:00,567 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:45:00,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:00,567 INFO L225 Difference]: With dead ends: 201 [2021-02-19 17:45:00,567 INFO L226 Difference]: Without dead ends: 197 [2021-02-19 17:45:00,567 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:45:00,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-02-19 17:45:00,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 182. [2021-02-19 17:45:00,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.9613259668508287) internal successors, (536), 181 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:00,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 536 transitions. [2021-02-19 17:45:00,570 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 536 transitions. Word has length 17 [2021-02-19 17:45:00,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:00,570 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 536 transitions. [2021-02-19 17:45:00,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:00,570 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 536 transitions. [2021-02-19 17:45:00,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:45:00,570 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:00,570 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:00,770 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1639,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:45:00,771 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:00,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:00,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1323401473, now seen corresponding path program 42 times [2021-02-19 17:45:00,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:00,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065619526] [2021-02-19 17:45:00,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:00,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:01,084 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:01,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065619526] [2021-02-19 17:45:01,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330103853] [2021-02-19 17:45:01,084 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 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 [2021-02-19 17:45:01,105 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:45:01,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:45:01,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:45:01,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:01,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:01,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:01,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:45:01,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:01,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:01,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:45:01,304 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:01,376 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:01,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:01,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:01,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:45:01,383 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-02-19 17:45:01,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:01,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:45:01,390 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:01,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:01,466 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-02-19 17:45:01,466 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:134, output treesize:124 [2021-02-19 17:45:01,686 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_480, v_prenex_482, array_4, v_prenex_484], 1=[v_prenex_481, array_2, v_prenex_483, v_prenex_479]} [2021-02-19 17:45:01,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:45:01,693 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:01,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:45:01,700 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-02-19 17:45:01,856 WARN L202 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 53 [2021-02-19 17:45:01,856 INFO L628 ElimStorePlain]: treesize reduction 152, result has 48.8 percent of original size [2021-02-19 17:45:01,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:45:01,864 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:01,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:45:01,869 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:01,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:01,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:45:01,929 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-02-19 17:45:01,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:01,995 INFO L518 ElimStorePlain]: Eliminatee v_prenex_484 vanished before elimination [2021-02-19 17:45:02,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:02,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:02,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:45:02,006 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:02,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:02,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:45:02,014 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:02,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:02,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:02,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:02,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:45:02,099 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:02,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:02,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-02-19 17:45:02,104 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:02,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:02,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:02,185 INFO L518 ElimStorePlain]: Eliminatee v_prenex_483 vanished before elimination [2021-02-19 17:45:02,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:02,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:02,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:45:02,193 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:02,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:02,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:45:02,197 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:02,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:02,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:02,270 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-02-19 17:45:02,270 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 12 variables, input treesize:293, output treesize:52 [2021-02-19 17:45:02,352 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:02,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:02,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-02-19 17:45:02,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795419131] [2021-02-19 17:45:02,353 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:45:02,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:02,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:45:02,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:45:02,353 INFO L87 Difference]: Start difference. First operand 182 states and 536 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:02,886 WARN L202 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 80 [2021-02-19 17:45:03,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:03,014 INFO L93 Difference]: Finished difference Result 212 states and 614 transitions. [2021-02-19 17:45:03,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 17:45:03,015 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:45:03,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:03,015 INFO L225 Difference]: With dead ends: 212 [2021-02-19 17:45:03,015 INFO L226 Difference]: Without dead ends: 208 [2021-02-19 17:45:03,015 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:45:03,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-02-19 17:45:03,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 180. [2021-02-19 17:45:03,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.9497206703910615) internal successors, (528), 179 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:03,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 528 transitions. [2021-02-19 17:45:03,017 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 528 transitions. Word has length 17 [2021-02-19 17:45:03,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:03,018 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 528 transitions. [2021-02-19 17:45:03,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:03,018 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 528 transitions. [2021-02-19 17:45:03,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:45:03,018 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:03,018 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:03,218 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1709 [2021-02-19 17:45:03,218 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:03,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:03,219 INFO L82 PathProgramCache]: Analyzing trace with hash 250316093, now seen corresponding path program 43 times [2021-02-19 17:45:03,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:03,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284780797] [2021-02-19 17:45:03,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:03,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:03,480 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:03,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284780797] [2021-02-19 17:45:03,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399721219] [2021-02-19 17:45:03,480 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:45:03,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:03,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:45:03,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:45:03,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:03,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:45:03,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:03,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:03,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:45:03,668 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:03,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:03,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:45:03,679 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:03,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:45:03,685 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-02-19 17:45:03,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:03,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-02-19 17:45:03,776 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:157, output treesize:147 [2021-02-19 17:45:04,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:04,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:04,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-02-19 17:45:04,085 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 17:45:04,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:04,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:04,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:45:04,098 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:04,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:04,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:04,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-02-19 17:45:04,112 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-02-19 17:45:04,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:04,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:04,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:45:04,127 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-02-19 17:45:04,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:04,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-02-19 17:45:04,141 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 4 xjuncts. [2021-02-19 17:45:04,518 WARN L202 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 70 [2021-02-19 17:45:04,518 INFO L628 ElimStorePlain]: treesize reduction 234, result has 57.8 percent of original size [2021-02-19 17:45:04,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:04,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:04,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:45:04,526 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:04,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:04,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:04,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-02-19 17:45:04,533 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:04,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:04,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:04,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:04,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:45:04,565 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:04,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:04,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:04,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:45:04,572 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:04,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:04,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:04,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:45:04,579 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:04,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:04,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:04,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:04,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:45:04,605 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:04,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:04,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-02-19 17:45:04,616 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:04,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:04,788 WARN L202 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-02-19 17:45:04,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:04,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-02-19 17:45:04,794 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:04,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:04,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:04,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:45:04,802 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:04,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:04,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:45:04,808 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:04,959 WARN L202 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-02-19 17:45:04,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:04,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:04,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:04,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:45:04,967 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:04,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:04,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:45:04,973 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:05,125 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-02-19 17:45:05,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:05,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-02-19 17:45:05,128 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 6 variables, input treesize:424, output treesize:140 [2021-02-19 17:45:05,263 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-02-19 17:45:05,372 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:05,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:05,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:45:05,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814853279] [2021-02-19 17:45:05,372 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:45:05,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:05,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:45:05,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:45:05,373 INFO L87 Difference]: Start difference. First operand 180 states and 528 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:05,936 WARN L202 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-02-19 17:45:06,092 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-02-19 17:45:06,406 WARN L202 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 57 [2021-02-19 17:45:06,689 WARN L202 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2021-02-19 17:45:06,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:06,784 INFO L93 Difference]: Finished difference Result 211 states and 605 transitions. [2021-02-19 17:45:06,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:45:06,785 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:45:06,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:06,786 INFO L225 Difference]: With dead ends: 211 [2021-02-19 17:45:06,786 INFO L226 Difference]: Without dead ends: 203 [2021-02-19 17:45:06,786 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:45:06,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-02-19 17:45:06,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 177. [2021-02-19 17:45:06,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.9488636363636362) internal successors, (519), 176 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:06,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 519 transitions. [2021-02-19 17:45:06,788 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 519 transitions. Word has length 17 [2021-02-19 17:45:06,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:06,788 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 519 transitions. [2021-02-19 17:45:06,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:06,788 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 519 transitions. [2021-02-19 17:45:06,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:45:06,789 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:06,789 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:07,002 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1756 [2021-02-19 17:45:07,002 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:07,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:07,002 INFO L82 PathProgramCache]: Analyzing trace with hash -326980299, now seen corresponding path program 44 times [2021-02-19 17:45:07,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:07,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402079456] [2021-02-19 17:45:07,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:07,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:07,331 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:07,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402079456] [2021-02-19 17:45:07,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520238024] [2021-02-19 17:45:07,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 17:45:07,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:45:07,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:45:07,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:45:07,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:07,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:07,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:07,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:45:07,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:07,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:07,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:07,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:45:07,544 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:07,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:07,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:07,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:45:07,551 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:07,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:07,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-02-19 17:45:07,559 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-02-19 17:45:07,682 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-02-19 17:45:07,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:07,693 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-02-19 17:45:07,693 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:167, output treesize:227 [2021-02-19 17:45:08,117 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-02-19 17:45:08,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:08,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:08,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:45:08,264 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 17:45:08,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:08,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:45:08,274 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:08,767 WARN L202 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 132 [2021-02-19 17:45:08,768 INFO L628 ElimStorePlain]: treesize reduction 235, result has 62.3 percent of original size [2021-02-19 17:45:08,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:08,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-02-19 17:45:08,777 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:08,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:45:08,786 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:08,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:09,005 WARN L202 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-02-19 17:45:09,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:09,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:09,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:45:09,015 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-02-19 17:45:09,236 WARN L202 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2021-02-19 17:45:09,237 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:09,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-02-19 17:45:09,246 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:09,459 WARN L202 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-02-19 17:45:09,460 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:09,460 INFO L518 ElimStorePlain]: Eliminatee v_prenex_494 vanished before elimination [2021-02-19 17:45:09,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:09,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:45:09,469 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:09,476 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:45:09,477 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:09,498 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:09,738 WARN L202 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-02-19 17:45:09,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:09,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:09,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 38 [2021-02-19 17:45:09,748 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:09,975 WARN L202 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-02-19 17:45:09,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:09,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-02-19 17:45:09,984 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:10,192 WARN L202 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-02-19 17:45:10,193 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:10,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:10,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:10,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-02-19 17:45:10,202 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:10,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:10,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:45:10,210 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:10,593 WARN L202 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 100 [2021-02-19 17:45:10,594 INFO L628 ElimStorePlain]: treesize reduction 11, result has 96.5 percent of original size [2021-02-19 17:45:10,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:10,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:45:10,602 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:10,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:45:10,609 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:10,797 WARN L202 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-02-19 17:45:10,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:10,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:10,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-02-19 17:45:10,805 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:11,183 WARN L202 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2021-02-19 17:45:11,184 INFO L628 ElimStorePlain]: treesize reduction 5, result has 98.2 percent of original size [2021-02-19 17:45:11,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:45:11,191 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:11,372 WARN L202 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-02-19 17:45:11,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:11,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:11,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:11,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:45:11,381 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:11,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:11,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-02-19 17:45:11,389 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:11,724 WARN L202 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2021-02-19 17:45:11,725 INFO L628 ElimStorePlain]: treesize reduction 10, result has 96.0 percent of original size [2021-02-19 17:45:11,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:11,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:45:11,732 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:11,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:45:11,745 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:11,917 WARN L202 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-02-19 17:45:11,918 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:11,924 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 14 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-02-19 17:45:11,924 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 21 variables, input treesize:621, output treesize:155 [2021-02-19 17:45:12,178 WARN L202 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-02-19 17:45:12,282 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:12,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:12,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:45:12,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386100729] [2021-02-19 17:45:12,282 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:45:12,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:12,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:45:12,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:45:12,283 INFO L87 Difference]: Start difference. First operand 177 states and 519 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:12,854 WARN L202 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2021-02-19 17:45:13,206 WARN L202 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 90 [2021-02-19 17:45:13,684 WARN L202 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 89 [2021-02-19 17:45:14,330 WARN L202 SmtUtils]: Spent 562.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 104 [2021-02-19 17:45:14,885 WARN L202 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 96 [2021-02-19 17:45:15,400 WARN L202 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 110 [2021-02-19 17:45:16,021 WARN L202 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 119 [2021-02-19 17:45:16,616 WARN L202 SmtUtils]: Spent 525.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 117 [2021-02-19 17:45:17,226 WARN L202 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 114 [2021-02-19 17:45:17,874 WARN L202 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 121 [2021-02-19 17:45:17,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:17,969 INFO L93 Difference]: Finished difference Result 280 states and 792 transitions. [2021-02-19 17:45:17,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:45:17,970 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:45:17,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:17,970 INFO L225 Difference]: With dead ends: 280 [2021-02-19 17:45:17,970 INFO L226 Difference]: Without dead ends: 272 [2021-02-19 17:45:17,970 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:45:17,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-02-19 17:45:17,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 184. [2021-02-19 17:45:17,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.978142076502732) internal successors, (545), 183 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:17,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 545 transitions. [2021-02-19 17:45:17,973 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 545 transitions. Word has length 17 [2021-02-19 17:45:17,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:17,973 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 545 transitions. [2021-02-19 17:45:17,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:17,973 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 545 transitions. [2021-02-19 17:45:17,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:45:17,973 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:17,973 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:18,174 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1782 [2021-02-19 17:45:18,174 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:18,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:18,174 INFO L82 PathProgramCache]: Analyzing trace with hash 877430217, now seen corresponding path program 45 times [2021-02-19 17:45:18,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:18,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210685210] [2021-02-19 17:45:18,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:18,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:18,621 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:18,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210685210] [2021-02-19 17:45:18,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192458524] [2021-02-19 17:45:18,622 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 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 [2021-02-19 17:45:18,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:45:18,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:45:18,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:45:18,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:18,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:18,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:18,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:45:18,825 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:18,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:18,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:18,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:45:18,833 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:18,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:18,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:18,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:45:18,841 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:18,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:18,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-02-19 17:45:18,849 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-02-19 17:45:18,963 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-02-19 17:45:18,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:18,974 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-02-19 17:45:18,974 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:163, output treesize:223 [2021-02-19 17:45:19,278 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-02-19 17:45:19,682 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 77 [2021-02-19 17:45:19,813 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_525, v_prenex_519, array_4, v_prenex_521, v_prenex_523], 1=[v_prenex_518, array_2, v_prenex_520, v_prenex_522, v_prenex_524]} [2021-02-19 17:45:19,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-02-19 17:45:19,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:19,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:45:19,829 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:20,004 WARN L202 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 65 [2021-02-19 17:45:20,005 INFO L628 ElimStorePlain]: treesize reduction 198, result has 39.6 percent of original size [2021-02-19 17:45:20,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:45:20,011 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-02-19 17:45:20,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:20,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17 [2021-02-19 17:45:20,077 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:20,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:20,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:45:20,153 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:20,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:20,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-02-19 17:45:20,218 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:20,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:20,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:20,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:20,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:45:20,277 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:20,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:20,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:45:20,283 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:20,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:20,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:20,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:20,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:45:20,354 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:20,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:20,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:20,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-02-19 17:45:20,409 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:20,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:20,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:20,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-02-19 17:45:20,464 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:20,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:20,512 INFO L518 ElimStorePlain]: Eliminatee v_prenex_524 vanished before elimination [2021-02-19 17:45:20,515 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 10 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-02-19 17:45:20,515 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 15 variables, input treesize:347, output treesize:44 [2021-02-19 17:45:20,591 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:20,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:20,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-02-19 17:45:20,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935962583] [2021-02-19 17:45:20,592 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:45:20,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:20,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:45:20,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:45:20,592 INFO L87 Difference]: Start difference. First operand 184 states and 545 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:20,856 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-02-19 17:45:21,279 WARN L202 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 82 [2021-02-19 17:45:21,747 WARN L202 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 92 [2021-02-19 17:45:22,229 WARN L202 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 100 [2021-02-19 17:45:23,003 WARN L202 SmtUtils]: Spent 675.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 143 [2021-02-19 17:45:23,325 WARN L202 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 95 [2021-02-19 17:45:23,844 WARN L202 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 97 [2021-02-19 17:45:23,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:23,981 INFO L93 Difference]: Finished difference Result 272 states and 761 transitions. [2021-02-19 17:45:23,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:45:23,982 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:45:23,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:23,983 INFO L225 Difference]: With dead ends: 272 [2021-02-19 17:45:23,983 INFO L226 Difference]: Without dead ends: 264 [2021-02-19 17:45:23,983 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:45:23,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-02-19 17:45:23,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 182. [2021-02-19 17:45:23,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.9613259668508287) internal successors, (536), 181 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:23,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 536 transitions. [2021-02-19 17:45:23,987 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 536 transitions. Word has length 17 [2021-02-19 17:45:23,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:23,987 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 536 transitions. [2021-02-19 17:45:23,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:23,987 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 536 transitions. [2021-02-19 17:45:23,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:45:23,987 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:23,987 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:24,193 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1822 [2021-02-19 17:45:24,194 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:24,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:24,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1934744063, now seen corresponding path program 46 times [2021-02-19 17:45:24,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:24,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683037664] [2021-02-19 17:45:24,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:24,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:24,410 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-02-19 17:45:24,590 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:24,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683037664] [2021-02-19 17:45:24,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829425802] [2021-02-19 17:45:24,591 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 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 [2021-02-19 17:45:24,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:45:24,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:45:24,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:45:24,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:24,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:24,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:24,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:45:24,746 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:24,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:24,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:24,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:45:24,754 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:24,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:24,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:24,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:45:24,762 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-02-19 17:45:24,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:24,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:45:24,769 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:24,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:24,877 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-02-19 17:45:24,877 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:197, output treesize:187 [2021-02-19 17:45:25,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:25,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:25,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-02-19 17:45:25,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 17:45:25,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:25,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:45:25,374 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:25,903 WARN L202 SmtUtils]: Spent 529.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 107 [2021-02-19 17:45:25,904 INFO L628 ElimStorePlain]: treesize reduction 163, result has 69.2 percent of original size [2021-02-19 17:45:25,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:25,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:45:25,913 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-02-19 17:45:26,160 WARN L202 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-02-19 17:45:26,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:26,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:26,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:26,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:45:26,170 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:26,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:26,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-02-19 17:45:26,179 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:26,405 WARN L202 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-02-19 17:45:26,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:26,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:26,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:26,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:45:26,415 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:26,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:26,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-02-19 17:45:26,424 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:26,646 WARN L202 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-02-19 17:45:26,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:26,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:26,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:26,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:45:26,656 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:26,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:26,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-02-19 17:45:26,664 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:26,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:26,906 WARN L202 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-02-19 17:45:26,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:26,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-02-19 17:45:26,916 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:27,133 WARN L202 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-02-19 17:45:27,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:27,133 INFO L518 ElimStorePlain]: Eliminatee v_prenex_532 vanished before elimination [2021-02-19 17:45:27,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:27,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:27,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:45:27,143 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:27,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:27,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:45:27,152 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:27,356 WARN L202 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-02-19 17:45:27,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:27,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:27,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:27,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:45:27,367 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:27,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:27,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-02-19 17:45:27,375 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:27,579 WARN L202 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-02-19 17:45:27,580 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:27,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:27,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:27,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:45:27,588 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:27,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:27,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:45:27,595 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:27,787 WARN L202 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-02-19 17:45:27,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:27,791 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 10 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-02-19 17:45:27,791 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 15 variables, input treesize:524, output treesize:216 [2021-02-19 17:45:28,060 WARN L202 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-02-19 17:45:28,168 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:28,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:28,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-02-19 17:45:28,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488802703] [2021-02-19 17:45:28,168 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:45:28,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:28,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:45:28,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:45:28,168 INFO L87 Difference]: Start difference. First operand 182 states and 536 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:28,620 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 76 [2021-02-19 17:45:29,081 WARN L202 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 99 [2021-02-19 17:45:29,556 WARN L202 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 97 [2021-02-19 17:45:30,033 WARN L202 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 102 [2021-02-19 17:45:30,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:30,150 INFO L93 Difference]: Finished difference Result 266 states and 763 transitions. [2021-02-19 17:45:30,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:45:30,152 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:45:30,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:30,152 INFO L225 Difference]: With dead ends: 266 [2021-02-19 17:45:30,152 INFO L226 Difference]: Without dead ends: 262 [2021-02-19 17:45:30,152 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:45:30,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-02-19 17:45:30,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 179. [2021-02-19 17:45:30,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.949438202247191) internal successors, (525), 178 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:30,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 525 transitions. [2021-02-19 17:45:30,155 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 525 transitions. Word has length 17 [2021-02-19 17:45:30,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:30,155 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 525 transitions. [2021-02-19 17:45:30,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:30,155 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 525 transitions. [2021-02-19 17:45:30,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:45:30,155 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:30,155 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:30,356 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1859,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:45:30,356 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:30,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:30,356 INFO L82 PathProgramCache]: Analyzing trace with hash 947968379, now seen corresponding path program 47 times [2021-02-19 17:45:30,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:30,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086664480] [2021-02-19 17:45:30,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:30,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:30,797 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:30,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086664480] [2021-02-19 17:45:30,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29049494] [2021-02-19 17:45:30,797 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 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 [2021-02-19 17:45:30,816 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:45:30,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:45:30,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:45:30,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:31,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:31,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:31,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:45:31,037 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 17:45:31,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:31,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:31,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:45:31,045 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:31,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:31,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:31,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:45:31,053 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:31,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:31,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:45:31,075 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:31,227 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-02-19 17:45:31,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:31,239 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-02-19 17:45:31,239 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:197, output treesize:187 [2021-02-19 17:45:31,936 WARN L202 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 87 [2021-02-19 17:45:32,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:32,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:32,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:45:32,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 17:45:32,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:32,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:45:32,439 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:32,814 WARN L202 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 109 [2021-02-19 17:45:32,815 INFO L628 ElimStorePlain]: treesize reduction 154, result has 63.8 percent of original size [2021-02-19 17:45:32,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:32,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:32,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:45:32,825 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:32,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:32,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-02-19 17:45:32,834 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:32,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:33,002 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-02-19 17:45:33,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:33,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:33,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:45:33,011 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:33,154 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-02-19 17:45:33,155 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:33,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:33,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:45:33,163 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:33,307 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-02-19 17:45:33,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:33,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:33,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:33,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:45:33,317 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:33,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:33,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-02-19 17:45:33,327 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:33,464 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-02-19 17:45:33,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:33,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:33,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:33,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:45:33,475 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:33,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:33,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-02-19 17:45:33,484 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:33,622 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-02-19 17:45:33,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:33,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-02-19 17:45:33,631 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:33,768 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-02-19 17:45:33,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:33,769 INFO L518 ElimStorePlain]: Eliminatee v_prenex_565 vanished before elimination [2021-02-19 17:45:33,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-02-19 17:45:33,777 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:33,910 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-02-19 17:45:33,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:33,911 INFO L518 ElimStorePlain]: Eliminatee v_prenex_555 vanished before elimination [2021-02-19 17:45:33,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:33,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:33,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:45:33,921 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:33,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:33,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:45:33,929 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:34,053 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-02-19 17:45:34,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:34,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:34,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:34,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:45:34,063 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:34,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:34,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:45:34,071 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:34,197 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-02-19 17:45:34,198 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:34,203 INFO L550 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 12 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-02-19 17:45:34,203 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 24 variables, input treesize:424, output treesize:62 [2021-02-19 17:45:34,290 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:34,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:34,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-02-19 17:45:34,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097588569] [2021-02-19 17:45:34,291 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:45:34,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:34,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:45:34,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:45:34,291 INFO L87 Difference]: Start difference. First operand 179 states and 525 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:34,928 WARN L202 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 72 [2021-02-19 17:45:35,749 WARN L202 SmtUtils]: Spent 728.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 134 [2021-02-19 17:45:36,011 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 21 [2021-02-19 17:45:36,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:36,141 INFO L93 Difference]: Finished difference Result 208 states and 602 transitions. [2021-02-19 17:45:36,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:45:36,142 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:45:36,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:36,143 INFO L225 Difference]: With dead ends: 208 [2021-02-19 17:45:36,143 INFO L226 Difference]: Without dead ends: 204 [2021-02-19 17:45:36,143 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:45:36,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-02-19 17:45:36,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 183. [2021-02-19 17:45:36,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.9615384615384617) internal successors, (539), 182 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:36,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 539 transitions. [2021-02-19 17:45:36,145 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 539 transitions. Word has length 17 [2021-02-19 17:45:36,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:36,145 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 539 transitions. [2021-02-19 17:45:36,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:36,146 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 539 transitions. [2021-02-19 17:45:36,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:45:36,146 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:36,146 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:36,346 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1896,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:45:36,346 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:36,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:36,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1931330025, now seen corresponding path program 48 times [2021-02-19 17:45:36,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:36,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130676494] [2021-02-19 17:45:36,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:36,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:36,677 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-02-19 17:45:36,757 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:36,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130676494] [2021-02-19 17:45:36,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637374181] [2021-02-19 17:45:36,757 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 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 [2021-02-19 17:45:36,777 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:45:36,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:45:36,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:45:36,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:36,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:36,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:36,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:45:36,923 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:36,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:36,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:36,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:45:36,930 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:36,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:36,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:36,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:45:36,937 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-02-19 17:45:36,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:36,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:45:36,944 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:37,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:37,039 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-02-19 17:45:37,039 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:157, output treesize:147 [2021-02-19 17:45:37,201 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_569, array_4, v_prenex_571, v_prenex_567], 1=[array_2, v_prenex_570, v_prenex_566, v_prenex_568]} [2021-02-19 17:45:37,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:45:37,209 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 17:45:37,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:45:37,217 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:37,576 WARN L202 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2021-02-19 17:45:37,577 INFO L628 ElimStorePlain]: treesize reduction 88, result has 76.7 percent of original size [2021-02-19 17:45:37,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-02-19 17:45:37,583 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:37,877 WARN L202 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2021-02-19 17:45:37,877 INFO L628 ElimStorePlain]: treesize reduction 26, result has 90.8 percent of original size [2021-02-19 17:45:37,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:45:37,884 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-02-19 17:45:38,196 WARN L202 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2021-02-19 17:45:38,197 INFO L628 ElimStorePlain]: treesize reduction 8, result has 97.0 percent of original size [2021-02-19 17:45:38,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:45:38,203 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:38,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-02-19 17:45:38,211 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-02-19 17:45:38,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17 [2021-02-19 17:45:38,218 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:38,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:45:38,224 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:38,560 WARN L202 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2021-02-19 17:45:38,561 INFO L628 ElimStorePlain]: treesize reduction 11, result has 96.0 percent of original size [2021-02-19 17:45:38,561 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:45:38,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:38,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:38,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-02-19 17:45:38,570 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:38,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:38,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:45:38,577 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:38,594 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:38,749 WARN L202 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-02-19 17:45:38,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:38,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:38,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:38,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:45:38,757 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:38,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:38,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:38,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 15 [2021-02-19 17:45:38,765 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:38,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:38,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:38,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:38,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:45:38,795 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:38,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:38,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:38,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:45:38,803 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:38,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:38,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:45:38,809 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:38,975 WARN L202 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-02-19 17:45:38,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:38,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:38,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:38,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:45:38,983 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:38,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:38,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:45:38,989 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:39,002 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:39,140 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-02-19 17:45:39,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:39,142 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-02-19 17:45:39,142 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 8 variables, input treesize:374, output treesize:157 [2021-02-19 17:45:39,316 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-02-19 17:45:39,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:39,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:39,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:45:39,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338443304] [2021-02-19 17:45:39,445 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:45:39,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:39,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:45:39,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:45:39,445 INFO L87 Difference]: Start difference. First operand 183 states and 539 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:40,221 WARN L202 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-02-19 17:45:40,624 WARN L202 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2021-02-19 17:45:41,007 WARN L202 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2021-02-19 17:45:41,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:41,130 INFO L93 Difference]: Finished difference Result 220 states and 638 transitions. [2021-02-19 17:45:41,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:45:41,131 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:45:41,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:41,131 INFO L225 Difference]: With dead ends: 220 [2021-02-19 17:45:41,131 INFO L226 Difference]: Without dead ends: 216 [2021-02-19 17:45:41,132 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:45:41,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-02-19 17:45:41,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 181. [2021-02-19 17:45:41,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.95) internal successors, (531), 180 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:41,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 531 transitions. [2021-02-19 17:45:41,134 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 531 transitions. Word has length 17 [2021-02-19 17:45:41,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:41,134 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 531 transitions. [2021-02-19 17:45:41,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:41,134 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 531 transitions. [2021-02-19 17:45:41,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:45:41,134 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:41,134 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:41,335 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1968,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:45:41,335 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:41,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:41,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1290551891, now seen corresponding path program 49 times [2021-02-19 17:45:41,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:41,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369912893] [2021-02-19 17:45:41,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:41,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:41,690 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:41,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369912893] [2021-02-19 17:45:41,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651358100] [2021-02-19 17:45:41,690 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 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 [2021-02-19 17:45:41,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:41,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:45:41,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:41,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:41,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:45:41,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:41,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:41,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:45:41,913 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-02-19 17:45:41,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:41,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:45:41,919 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:41,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:45:41,925 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:42,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:42,015 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-02-19 17:45:42,015 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:149, output treesize:139 [2021-02-19 17:45:42,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:42,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:42,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:45:42,466 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:42,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:42,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-02-19 17:45:42,476 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-02-19 17:45:42,948 WARN L202 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 78 [2021-02-19 17:45:42,949 INFO L628 ElimStorePlain]: treesize reduction 151, result has 68.4 percent of original size [2021-02-19 17:45:42,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:42,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:42,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:45:42,958 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:42,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:42,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:45:42,965 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:42,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:43,179 WARN L202 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-02-19 17:45:43,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:43,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:43,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:43,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-02-19 17:45:43,189 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-02-19 17:45:43,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:43,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:43,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-02-19 17:45:43,199 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-02-19 17:45:43,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:43,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:43,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:45:43,208 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:43,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:43,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:45:43,216 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:43,434 WARN L202 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-02-19 17:45:43,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:43,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:43,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:43,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:45:43,444 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:43,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:43,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:43,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:45:43,453 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:43,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:43,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:43,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-02-19 17:45:43,463 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:43,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:43,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:43,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:43,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-02-19 17:45:43,490 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:43,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:43,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:43,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-02-19 17:45:43,499 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:43,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:43,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:43,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:45:43,540 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:43,743 WARN L202 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-02-19 17:45:43,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:43,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-02-19 17:45:43,753 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:43,963 WARN L202 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-02-19 17:45:43,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:43,963 INFO L518 ElimStorePlain]: Eliminatee v_prenex_576 vanished before elimination [2021-02-19 17:45:43,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:43,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:43,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:45:43,972 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:43,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:43,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:45:43,981 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 2 xjuncts. [2021-02-19 17:45:44,184 WARN L202 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-02-19 17:45:44,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:44,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:44,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:44,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-02-19 17:45:44,194 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:44,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:44,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:44,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:45:44,203 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:44,220 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:44,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:44,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-02-19 17:45:44,228 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:44,428 WARN L202 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-02-19 17:45:44,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:44,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-02-19 17:45:44,433 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 12 variables, input treesize:404, output treesize:176 [2021-02-19 17:45:44,722 WARN L202 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-02-19 17:45:44,843 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:44,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:44,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:45:44,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991493814] [2021-02-19 17:45:44,844 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:45:44,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:44,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:45:44,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:45:44,844 INFO L87 Difference]: Start difference. First operand 181 states and 531 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:45,434 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2021-02-19 17:45:45,813 WARN L202 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 63 [2021-02-19 17:45:46,031 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-02-19 17:45:46,426 WARN L202 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2021-02-19 17:45:46,773 WARN L202 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2021-02-19 17:45:47,283 WARN L202 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-02-19 17:45:47,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:47,380 INFO L93 Difference]: Finished difference Result 235 states and 653 transitions. [2021-02-19 17:45:47,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:45:47,381 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:45:47,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:47,381 INFO L225 Difference]: With dead ends: 235 [2021-02-19 17:45:47,382 INFO L226 Difference]: Without dead ends: 223 [2021-02-19 17:45:47,382 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:45:47,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-02-19 17:45:47,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 184. [2021-02-19 17:45:47,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.9617486338797816) internal successors, (542), 183 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:47,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 542 transitions. [2021-02-19 17:45:47,384 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 542 transitions. Word has length 17 [2021-02-19 17:45:47,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:47,384 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 542 transitions. [2021-02-19 17:45:47,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:47,384 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 542 transitions. [2021-02-19 17:45:47,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:45:47,384 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:47,384 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:47,599 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1988,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:45:47,599 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:47,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:47,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1032702051, now seen corresponding path program 50 times [2021-02-19 17:45:47,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:47,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627634801] [2021-02-19 17:45:47,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:47,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:48,041 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:48,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627634801] [2021-02-19 17:45:48,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179252068] [2021-02-19 17:45:48,041 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 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 [2021-02-19 17:45:48,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:45:48,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:45:48,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:45:48,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:48,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:45:48,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 17:45:48,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:45:48,261 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:48,363 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-02-19 17:45:48,364 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:48,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:45:48,370 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:48,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:45:48,376 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:48,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:48,466 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-02-19 17:45:48,466 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:168, output treesize:158 [2021-02-19 17:45:48,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:48,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:48,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-02-19 17:45:48,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 17:45:48,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:48,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:48,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-02-19 17:45:48,666 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-02-19 17:45:48,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:48,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:48,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:45:48,676 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:48,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:48,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:48,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:45:48,687 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:48,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:48,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:48,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-02-19 17:45:48,698 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 4 xjuncts. [2021-02-19 17:45:48,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:48,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:48,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:45:48,708 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:48,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:48,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:48,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-02-19 17:45:48,719 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-02-19 17:45:48,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:48,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:48,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:45:48,729 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:48,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:48,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:48,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:45:48,738 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:48,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:48,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:45:48,748 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:49,134 WARN L202 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 47 [2021-02-19 17:45:49,135 INFO L628 ElimStorePlain]: treesize reduction 375, result has 39.3 percent of original size [2021-02-19 17:45:49,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:49,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:49,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:45:49,143 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:49,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:49,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:49,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:45:49,151 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:49,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:49,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:49,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:45:49,159 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:49,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:49,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:49,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:49,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:45:49,183 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:49,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:49,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:49,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:45:49,191 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:49,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:49,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:49,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:49,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:45:49,215 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:49,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:49,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:45:49,221 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:49,359 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-02-19 17:45:49,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:49,361 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-02-19 17:45:49,361 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 2 variables, input treesize:455, output treesize:164 [2021-02-19 17:45:49,531 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-02-19 17:45:49,687 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 19 [2021-02-19 17:45:49,705 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:49,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:49,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-02-19 17:45:49,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131092628] [2021-02-19 17:45:49,705 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:45:49,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:49,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:45:49,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:45:49,705 INFO L87 Difference]: Start difference. First operand 184 states and 542 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:50,032 WARN L202 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2021-02-19 17:45:50,376 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2021-02-19 17:45:50,817 WARN L202 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 70 [2021-02-19 17:45:51,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:51,026 INFO L93 Difference]: Finished difference Result 212 states and 611 transitions. [2021-02-19 17:45:51,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:45:51,027 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:45:51,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:51,027 INFO L225 Difference]: With dead ends: 212 [2021-02-19 17:45:51,027 INFO L226 Difference]: Without dead ends: 208 [2021-02-19 17:45:51,027 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:45:51,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-02-19 17:45:51,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 179. [2021-02-19 17:45:51,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.949438202247191) internal successors, (525), 178 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:51,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 525 transitions. [2021-02-19 17:45:51,030 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 525 transitions. Word has length 17 [2021-02-19 17:45:51,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:51,030 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 525 transitions. [2021-02-19 17:45:51,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:51,030 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 525 transitions. [2021-02-19 17:45:51,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:45:51,030 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:51,030 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:51,230 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2052 [2021-02-19 17:45:51,230 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:51,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:51,231 INFO L82 PathProgramCache]: Analyzing trace with hash -2132805607, now seen corresponding path program 51 times [2021-02-19 17:45:51,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:51,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459921840] [2021-02-19 17:45:51,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:51,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:51,580 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:51,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459921840] [2021-02-19 17:45:51,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180786642] [2021-02-19 17:45:51,581 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 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 [2021-02-19 17:45:51,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 17:45:51,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:45:51,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:45:51,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:51,976 INFO L446 ElimStorePlain]: Different costs {3=[array_2], 6=[v_prenex_587]} [2021-02-19 17:45:51,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:51,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:51,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-02-19 17:45:51,985 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-02-19 17:45:51,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:51,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:45:51,993 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:52,133 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-02-19 17:45:52,134 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:52,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:52,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:52,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:45:52,143 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:52,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:52,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:52,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:45:52,152 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:52,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:52,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:45:52,160 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:52,293 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-02-19 17:45:52,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:52,328 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: 10 dim-0 vars, and 5 xjuncts. [2021-02-19 17:45:52,329 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 9 variables, input treesize:184, output treesize:233 [2021-02-19 17:45:53,088 WARN L202 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 72 [2021-02-19 17:45:53,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:53,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:53,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:45:53,290 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:53,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:53,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-02-19 17:45:53,300 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:53,595 WARN L202 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 77 [2021-02-19 17:45:53,596 INFO L628 ElimStorePlain]: treesize reduction 132, result has 55.9 percent of original size [2021-02-19 17:45:53,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:53,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:45:53,605 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:53,720 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-02-19 17:45:53,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:53,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:53,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:45:53,729 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-02-19 17:45:53,855 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-02-19 17:45:53,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:53,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:53,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:53,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:45:53,865 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:53,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:53,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:45:53,874 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:53,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:54,019 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-02-19 17:45:54,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:54,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:54,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:54,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-02-19 17:45:54,030 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:54,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:54,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-02-19 17:45:54,039 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:54,153 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-02-19 17:45:54,154 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:54,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:54,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:54,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:45:54,163 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:54,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:54,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-02-19 17:45:54,172 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:54,289 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-02-19 17:45:54,290 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:54,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:54,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:45:54,298 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:54,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:54,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:54,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:45:54,401 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:54,496 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:54,500 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-02-19 17:45:54,501 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 16 variables, input treesize:316, output treesize:43 [2021-02-19 17:45:54,577 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:54,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:54,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-02-19 17:45:54,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11089361] [2021-02-19 17:45:54,578 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:45:54,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:54,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:45:54,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:45:54,578 INFO L87 Difference]: Start difference. First operand 179 states and 525 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:55,065 WARN L202 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-02-19 17:45:55,516 WARN L202 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 74 [2021-02-19 17:45:55,755 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 86 [2021-02-19 17:45:55,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:55,822 INFO L93 Difference]: Finished difference Result 240 states and 674 transitions. [2021-02-19 17:45:55,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:45:55,823 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:45:55,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:55,823 INFO L225 Difference]: With dead ends: 240 [2021-02-19 17:45:55,823 INFO L226 Difference]: Without dead ends: 236 [2021-02-19 17:45:55,824 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:45:55,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-02-19 17:45:55,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 184. [2021-02-19 17:45:55,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.9508196721311477) internal successors, (540), 183 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:55,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 540 transitions. [2021-02-19 17:45:55,826 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 540 transitions. Word has length 17 [2021-02-19 17:45:55,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:55,826 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 540 transitions. [2021-02-19 17:45:55,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:55,826 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 540 transitions. [2021-02-19 17:45:55,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:45:55,826 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:55,826 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:56,027 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2077,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:45:56,027 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:56,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:56,027 INFO L82 PathProgramCache]: Analyzing trace with hash 213095335, now seen corresponding path program 52 times [2021-02-19 17:45:56,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:56,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748310089] [2021-02-19 17:45:56,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:56,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:45:56,418 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:56,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748310089] [2021-02-19 17:45:56,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036479611] [2021-02-19 17:45:56,418 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 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 [2021-02-19 17:45:56,439 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:45:56,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:45:56,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:45:56,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:45:56,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:45:56,618 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:56,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:45:56,625 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-02-19 17:45:56,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:45:56,631 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:56,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:45:56,636 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:56,699 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:56,700 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-02-19 17:45:56,700 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:123, output treesize:111 [2021-02-19 17:45:56,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:56,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:45:56,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:56,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:56,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:45:56,855 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-02-19 17:45:56,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:56,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:45:56,863 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-02-19 17:45:56,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:56,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-02-19 17:45:56,872 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-02-19 17:45:56,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:56,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-02-19 17:45:56,881 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-02-19 17:45:56,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:56,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:45:56,891 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:56,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:56,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:45:56,899 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:56,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:56,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:45:56,907 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:56,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:56,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-02-19 17:45:56,915 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:56,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:45:56,922 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:57,247 WARN L202 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2021-02-19 17:45:57,248 INFO L628 ElimStorePlain]: treesize reduction 200, result has 54.8 percent of original size [2021-02-19 17:45:57,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:57,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-02-19 17:45:57,255 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:57,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:57,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:45:57,263 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:57,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:57,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:45:57,270 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:57,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:57,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:45:57,277 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:57,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:57,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:57,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:45:57,301 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:57,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:57,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-02-19 17:45:57,308 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:57,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:57,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:45:57,315 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:57,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:57,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:45:57,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:45:57,342 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:57,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:45:57,348 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-02-19 17:45:57,364 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:57,502 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-02-19 17:45:57,503 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:45:57,504 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-02-19 17:45:57,504 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 2 variables, input treesize:343, output treesize:143 [2021-02-19 17:45:57,667 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-02-19 17:45:57,776 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:45:57,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:45:57,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-02-19 17:45:57,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714687427] [2021-02-19 17:45:57,777 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:45:57,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:45:57,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:45:57,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:45:57,777 INFO L87 Difference]: Start difference. First operand 184 states and 540 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:58,175 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 28 [2021-02-19 17:45:58,684 WARN L202 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-02-19 17:45:59,077 WARN L202 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-02-19 17:45:59,463 WARN L202 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-02-19 17:45:59,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:45:59,523 INFO L93 Difference]: Finished difference Result 224 states and 652 transitions. [2021-02-19 17:45:59,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:45:59,524 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:45:59,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:45:59,525 INFO L225 Difference]: With dead ends: 224 [2021-02-19 17:45:59,525 INFO L226 Difference]: Without dead ends: 220 [2021-02-19 17:45:59,525 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:45:59,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-02-19 17:45:59,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 187. [2021-02-19 17:45:59,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.9516129032258065) internal successors, (549), 186 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:59,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 549 transitions. [2021-02-19 17:45:59,527 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 549 transitions. Word has length 17 [2021-02-19 17:45:59,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:45:59,528 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 549 transitions. [2021-02-19 17:45:59,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:45:59,528 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 549 transitions. [2021-02-19 17:45:59,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:45:59,528 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:45:59,528 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:45:59,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2113 [2021-02-19 17:45:59,728 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:45:59,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:45:59,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1694333205, now seen corresponding path program 53 times [2021-02-19 17:45:59,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:45:59,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373738230] [2021-02-19 17:45:59,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:45:59,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:00,018 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:00,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373738230] [2021-02-19 17:46:00,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954470494] [2021-02-19 17:46:00,018 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 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 [2021-02-19 17:46:00,038 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:46:00,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:00,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:46:00,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:00,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:00,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:00,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:46:00,346 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:00,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:00,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:00,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-02-19 17:46:00,356 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-02-19 17:46:00,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:00,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:00,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:46:00,365 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:00,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:00,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:46:00,373 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:00,523 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-02-19 17:46:00,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:00,537 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-02-19 17:46:00,537 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:209, output treesize:269 [2021-02-19 17:46:00,901 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 10=[array_2]} [2021-02-19 17:46:00,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:00,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:00,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 38 [2021-02-19 17:46:00,912 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:00,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:00,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:00,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-02-19 17:46:00,922 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:00,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:00,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:00,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:46:00,933 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-02-19 17:46:00,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:00,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:00,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:46:00,944 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:00,953 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 17:46:00,954 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:00,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:00,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:00,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:46:00,965 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:00,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:00,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:00,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:46:00,976 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:00,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:00,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:00,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:46:00,987 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:00,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:00,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:00,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-02-19 17:46:00,998 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:01,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:01,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:01,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:46:01,009 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:01,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:01,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:01,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 36 [2021-02-19 17:46:01,021 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:01,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:01,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:01,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:46:01,033 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 2 xjuncts. [2021-02-19 17:46:01,041 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 17:46:01,042 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:01,051 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 17:46:01,052 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:01,615 WARN L202 SmtUtils]: Spent 562.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 80 [2021-02-19 17:46:01,616 INFO L628 ElimStorePlain]: treesize reduction 170, result has 67.2 percent of original size [2021-02-19 17:46:01,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:01,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:01,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:46:01,626 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:01,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:01,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:01,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-02-19 17:46:01,636 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:01,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:01,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:01,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:01,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:46:01,664 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:01,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:01,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:01,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:46:01,674 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:01,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:01,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:01,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:01,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:46:01,702 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:01,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:01,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:01,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:46:01,711 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:01,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:01,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:01,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:46:01,721 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:01,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:01,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:01,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:46:01,731 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:01,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:01,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-02-19 17:46:01,740 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:01,955 WARN L202 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-02-19 17:46:01,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:01,960 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-02-19 17:46:01,960 INFO L247 ElimStorePlain]: Needed 24 recursive calls to eliminate 7 variables, input treesize:705, output treesize:139 [2021-02-19 17:46:02,121 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-02-19 17:46:02,236 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:02,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:02,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-02-19 17:46:02,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178973523] [2021-02-19 17:46:02,237 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:46:02,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:02,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:46:02,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:46:02,237 INFO L87 Difference]: Start difference. First operand 187 states and 549 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:02,636 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2021-02-19 17:46:03,177 WARN L202 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 111 [2021-02-19 17:46:03,508 WARN L202 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-02-19 17:46:03,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:03,547 INFO L93 Difference]: Finished difference Result 232 states and 663 transitions. [2021-02-19 17:46:03,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:46:03,549 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:46:03,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:03,549 INFO L225 Difference]: With dead ends: 232 [2021-02-19 17:46:03,549 INFO L226 Difference]: Without dead ends: 228 [2021-02-19 17:46:03,549 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:46:03,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-02-19 17:46:03,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 190. [2021-02-19 17:46:03,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.9682539682539684) internal successors, (561), 189 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:03,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 561 transitions. [2021-02-19 17:46:03,552 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 561 transitions. Word has length 17 [2021-02-19 17:46:03,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:03,552 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 561 transitions. [2021-02-19 17:46:03,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:03,552 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 561 transitions. [2021-02-19 17:46:03,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:03,552 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:03,552 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:03,752 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2129,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:03,752 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:03,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:03,753 INFO L82 PathProgramCache]: Analyzing trace with hash 23357189, now seen corresponding path program 54 times [2021-02-19 17:46:03,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:03,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017731845] [2021-02-19 17:46:03,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:03,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:04,107 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:04,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017731845] [2021-02-19 17:46:04,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455792787] [2021-02-19 17:46:04,107 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 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 [2021-02-19 17:46:04,126 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 17:46:04,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:04,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:46:04,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:04,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:46:04,454 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:04,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:46:04,460 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:04,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:46:04,467 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-02-19 17:46:04,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:46:04,473 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:04,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:46:04,479 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:04,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:46:04,485 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:04,617 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-02-19 17:46:04,618 INFO L628 ElimStorePlain]: treesize reduction 18, result has 85.8 percent of original size [2021-02-19 17:46:04,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-02-19 17:46:04,619 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:151, output treesize:109 [2021-02-19 17:46:04,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:46:04,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 17:46:04,779 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 17:46:04,780 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:04,874 INFO L628 ElimStorePlain]: treesize reduction 71, result has 53.9 percent of original size [2021-02-19 17:46:04,874 INFO L518 ElimStorePlain]: Eliminatee v_prenex_607 vanished before elimination [2021-02-19 17:46:04,874 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:46:04,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:46:04,880 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:04,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:46:04,885 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:04,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:46:04,891 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:04,931 INFO L628 ElimStorePlain]: treesize reduction 5, result has 83.9 percent of original size [2021-02-19 17:46:04,931 INFO L518 ElimStorePlain]: Eliminatee v_prenex_609 vanished before elimination [2021-02-19 17:46:04,931 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-02-19 17:46:04,933 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-02-19 17:46:04,933 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:187, output treesize:26 [2021-02-19 17:46:04,993 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:04,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:04,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-02-19 17:46:04,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766263708] [2021-02-19 17:46:04,994 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:46:04,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:04,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:46:04,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:46:04,994 INFO L87 Difference]: Start difference. First operand 190 states and 561 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:05,216 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2021-02-19 17:46:05,519 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2021-02-19 17:46:05,703 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2021-02-19 17:46:05,961 WARN L202 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2021-02-19 17:46:06,202 WARN L202 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-02-19 17:46:06,650 WARN L202 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 84 [2021-02-19 17:46:06,879 WARN L202 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2021-02-19 17:46:07,134 WARN L202 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2021-02-19 17:46:07,557 WARN L202 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 75 [2021-02-19 17:46:07,847 WARN L202 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 71 [2021-02-19 17:46:07,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:07,999 INFO L93 Difference]: Finished difference Result 233 states and 658 transitions. [2021-02-19 17:46:08,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:46:08,000 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:46:08,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:08,000 INFO L225 Difference]: With dead ends: 233 [2021-02-19 17:46:08,000 INFO L226 Difference]: Without dead ends: 225 [2021-02-19 17:46:08,000 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=176, Invalid=636, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:46:08,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-02-19 17:46:08,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 181. [2021-02-19 17:46:08,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.9611111111111112) internal successors, (533), 180 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:08,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 533 transitions. [2021-02-19 17:46:08,003 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 533 transitions. Word has length 17 [2021-02-19 17:46:08,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:08,003 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 533 transitions. [2021-02-19 17:46:08,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:08,003 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 533 transitions. [2021-02-19 17:46:08,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:08,003 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:08,003 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:08,206 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2158 [2021-02-19 17:46:08,206 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:08,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:08,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1115334069, now seen corresponding path program 55 times [2021-02-19 17:46:08,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:08,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680328291] [2021-02-19 17:46:08,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:08,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:08,447 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2021-02-19 17:46:08,719 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:08,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680328291] [2021-02-19 17:46:08,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694276604] [2021-02-19 17:46:08,719 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 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 [2021-02-19 17:46:08,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:08,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:46:08,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:08,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:08,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:08,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:46:08,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:08,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:08,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:08,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:46:08,973 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:08,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:08,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:08,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-02-19 17:46:08,982 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-02-19 17:46:08,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:08,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:46:08,990 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:09,232 WARN L202 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-02-19 17:46:09,233 INFO L628 ElimStorePlain]: treesize reduction 84, result has 65.4 percent of original size [2021-02-19 17:46:09,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-02-19 17:46:09,242 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:187, output treesize:159 [2021-02-19 17:46:09,751 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_613, v_prenex_615, array_0], 1=[v_prenex_614, v_prenex_616, array_4]} [2021-02-19 17:46:09,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:46:09,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:09,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:46:09,766 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:09,927 WARN L202 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-02-19 17:46:09,927 INFO L628 ElimStorePlain]: treesize reduction 31, result has 79.2 percent of original size [2021-02-19 17:46:09,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:46:09,934 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-02-19 17:46:10,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:10,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-02-19 17:46:10,028 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:10,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-02-19 17:46:10,034 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:10,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:10,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:10,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:10,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-02-19 17:46:10,116 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:10,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:10,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:46:10,124 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:10,196 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:10,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:10,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:10,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:46:10,204 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:10,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:10,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:46:10,211 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:10,229 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:10,299 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:10,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:10,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:10,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:46:10,307 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:10,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:10,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-02-19 17:46:10,314 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:10,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:10,386 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-02-19 17:46:10,386 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 9 variables, input treesize:163, output treesize:31 [2021-02-19 17:46:10,474 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:10,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:10,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-02-19 17:46:10,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384858733] [2021-02-19 17:46:10,475 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:46:10,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:10,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:46:10,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:46:10,475 INFO L87 Difference]: Start difference. First operand 181 states and 533 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:11,197 WARN L202 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2021-02-19 17:46:11,653 WARN L202 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 88 [2021-02-19 17:46:12,071 WARN L202 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 92 [2021-02-19 17:46:12,622 WARN L202 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 104 [2021-02-19 17:46:13,113 WARN L202 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 105 [2021-02-19 17:46:13,543 WARN L202 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2021-02-19 17:46:14,099 WARN L202 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 96 [2021-02-19 17:46:14,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:14,352 INFO L93 Difference]: Finished difference Result 331 states and 932 transitions. [2021-02-19 17:46:14,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:46:14,353 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:46:14,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:14,354 INFO L225 Difference]: With dead ends: 331 [2021-02-19 17:46:14,354 INFO L226 Difference]: Without dead ends: 327 [2021-02-19 17:46:14,354 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:46:14,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-02-19 17:46:14,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 179. [2021-02-19 17:46:14,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.949438202247191) internal successors, (525), 178 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:14,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 525 transitions. [2021-02-19 17:46:14,357 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 525 transitions. Word has length 17 [2021-02-19 17:46:14,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:14,357 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 525 transitions. [2021-02-19 17:46:14,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:14,357 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 525 transitions. [2021-02-19 17:46:14,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:14,357 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:14,357 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:14,570 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2181 [2021-02-19 17:46:14,570 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:14,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:14,570 INFO L82 PathProgramCache]: Analyzing trace with hash 672434929, now seen corresponding path program 56 times [2021-02-19 17:46:14,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:14,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707556215] [2021-02-19 17:46:14,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:14,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:14,769 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-02-19 17:46:14,917 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-02-19 17:46:15,250 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:15,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707556215] [2021-02-19 17:46:15,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568942291] [2021-02-19 17:46:15,251 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 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 [2021-02-19 17:46:15,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:46:15,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:15,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:46:15,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:15,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:15,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:15,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:46:15,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:15,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:15,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:15,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:46:15,490 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:15,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:15,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:15,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:46:15,499 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:15,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:15,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-02-19 17:46:15,507 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-02-19 17:46:15,661 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-02-19 17:46:15,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:15,674 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-02-19 17:46:15,674 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:159, output treesize:215 [2021-02-19 17:46:15,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:46:15,991 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:15,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-02-19 17:46:15,997 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:16,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:46:16,004 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-02-19 17:46:16,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-02-19 17:46:16,010 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:16,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:46:16,017 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-02-19 17:46:16,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:46:16,024 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-02-19 17:46:16,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:46:16,031 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:16,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:46:16,037 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:16,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:46:16,044 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:16,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:46:16,051 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:16,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-02-19 17:46:16,057 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:16,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:46:16,064 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:16,066 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 17:46:16,068 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:16,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:46:16,074 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:16,076 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 17:46:16,078 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:16,159 INFO L628 ElimStorePlain]: treesize reduction 90, result has 22.4 percent of original size [2021-02-19 17:46:16,160 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-02-19 17:46:16,161 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-02-19 17:46:16,161 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:351, output treesize:26 [2021-02-19 17:46:16,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:16,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:16,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-02-19 17:46:16,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886858539] [2021-02-19 17:46:16,227 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:46:16,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:16,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:46:16,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:46:16,228 INFO L87 Difference]: Start difference. First operand 179 states and 525 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:16,892 WARN L202 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2021-02-19 17:46:17,266 WARN L202 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 79 [2021-02-19 17:46:17,723 WARN L202 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 82 [2021-02-19 17:46:18,146 WARN L202 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 86 [2021-02-19 17:46:18,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:18,246 INFO L93 Difference]: Finished difference Result 246 states and 702 transitions. [2021-02-19 17:46:18,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:46:18,247 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:46:18,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:18,248 INFO L225 Difference]: With dead ends: 246 [2021-02-19 17:46:18,248 INFO L226 Difference]: Without dead ends: 242 [2021-02-19 17:46:18,248 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:46:18,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-02-19 17:46:18,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 187. [2021-02-19 17:46:18,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.9731182795698925) internal successors, (553), 186 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:18,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 553 transitions. [2021-02-19 17:46:18,250 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 553 transitions. Word has length 17 [2021-02-19 17:46:18,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:18,250 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 553 transitions. [2021-02-19 17:46:18,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:18,250 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 553 transitions. [2021-02-19 17:46:18,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:18,250 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:18,251 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:18,452 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2215 [2021-02-19 17:46:18,453 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:18,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:18,453 INFO L82 PathProgramCache]: Analyzing trace with hash -8917027, now seen corresponding path program 57 times [2021-02-19 17:46:18,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:18,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037573804] [2021-02-19 17:46:18,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:18,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:18,767 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-02-19 17:46:19,122 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:19,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037573804] [2021-02-19 17:46:19,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905955398] [2021-02-19 17:46:19,122 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 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 [2021-02-19 17:46:19,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 17:46:19,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:19,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:46:19,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:19,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:19,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:19,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:46:19,350 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:19,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:19,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:19,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:46:19,359 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:19,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:19,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:19,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:46:19,368 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:19,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:19,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-02-19 17:46:19,376 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-02-19 17:46:19,530 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-02-19 17:46:19,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:19,543 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-02-19 17:46:19,543 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:159, output treesize:215 [2021-02-19 17:46:20,027 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-02-19 17:46:20,348 WARN L202 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 55 [2021-02-19 17:46:20,641 INFO L446 ElimStorePlain]: Different costs {0=[array_0, v_prenex_628, v_prenex_630], 1=[v_prenex_629, array_4, v_prenex_631]} [2021-02-19 17:46:20,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:46:20,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:20,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:46:20,661 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-02-19 17:46:20,818 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 37 [2021-02-19 17:46:20,819 INFO L628 ElimStorePlain]: treesize reduction 131, result has 37.3 percent of original size [2021-02-19 17:46:20,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:46:20,826 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:20,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:20,876 INFO L518 ElimStorePlain]: Eliminatee v_prenex_630 vanished before elimination [2021-02-19 17:46:20,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:20,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:46:20,884 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:20,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:20,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:20,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:20,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:46:20,943 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:20,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:20,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:46:20,951 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:20,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:21,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:21,019 INFO L518 ElimStorePlain]: Eliminatee v_prenex_631 vanished before elimination [2021-02-19 17:46:21,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-02-19 17:46:21,023 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 9 variables, input treesize:205, output treesize:26 [2021-02-19 17:46:21,105 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:21,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:21,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-02-19 17:46:21,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247338512] [2021-02-19 17:46:21,106 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:46:21,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:21,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:46:21,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:46:21,106 INFO L87 Difference]: Start difference. First operand 187 states and 553 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:21,466 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 30 [2021-02-19 17:46:21,958 WARN L202 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 79 [2021-02-19 17:46:22,799 WARN L202 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 96 [2021-02-19 17:46:23,758 WARN L202 SmtUtils]: Spent 862.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 99 [2021-02-19 17:46:24,367 WARN L202 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 89 [2021-02-19 17:46:24,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:24,475 INFO L93 Difference]: Finished difference Result 257 states and 734 transitions. [2021-02-19 17:46:24,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:46:24,477 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:46:24,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:24,478 INFO L225 Difference]: With dead ends: 257 [2021-02-19 17:46:24,478 INFO L226 Difference]: Without dead ends: 253 [2021-02-19 17:46:24,478 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:46:24,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-02-19 17:46:24,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 189. [2021-02-19 17:46:24,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.984042553191489) internal successors, (561), 188 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:24,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 561 transitions. [2021-02-19 17:46:24,480 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 561 transitions. Word has length 17 [2021-02-19 17:46:24,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:24,480 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 561 transitions. [2021-02-19 17:46:24,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:24,480 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 561 transitions. [2021-02-19 17:46:24,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:24,481 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:24,481 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:24,681 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2235,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:24,681 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:24,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:24,681 INFO L82 PathProgramCache]: Analyzing trace with hash -255537199, now seen corresponding path program 58 times [2021-02-19 17:46:24,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:24,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13333470] [2021-02-19 17:46:24,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:24,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:24,877 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-02-19 17:46:25,018 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-02-19 17:46:25,136 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-02-19 17:46:25,265 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-02-19 17:46:25,362 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:25,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13333470] [2021-02-19 17:46:25,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601400428] [2021-02-19 17:46:25,363 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 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 [2021-02-19 17:46:25,386 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:46:25,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:25,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:46:25,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:25,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:25,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:25,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:46:25,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:25,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:25,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:46:25,603 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-02-19 17:46:25,692 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:25,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:25,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:25,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:46:25,702 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:25,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:25,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:46:25,710 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:25,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:25,803 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-02-19 17:46:25,803 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:126, output treesize:114 [2021-02-19 17:46:26,286 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_636, array_0, v_prenex_638, v_prenex_640, v_prenex_642], 1=[v_prenex_637, v_prenex_639, array_4, v_prenex_641, v_prenex_643]} [2021-02-19 17:46:26,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:46:26,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:26,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:46:26,307 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:26,624 WARN L202 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 76 [2021-02-19 17:46:26,625 INFO L628 ElimStorePlain]: treesize reduction 93, result has 68.9 percent of original size [2021-02-19 17:46:26,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:46:26,633 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-02-19 17:46:26,790 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-02-19 17:46:26,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:26,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:46:26,799 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-02-19 17:46:26,965 WARN L202 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-02-19 17:46:26,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:26,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-02-19 17:46:26,975 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:26,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-02-19 17:46:26,983 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:27,140 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-02-19 17:46:27,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:27,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:46:27,149 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:27,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-02-19 17:46:27,158 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:27,300 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-02-19 17:46:27,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:27,301 INFO L518 ElimStorePlain]: Eliminatee v_prenex_637 vanished before elimination [2021-02-19 17:46:27,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:27,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:27,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:46:27,311 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:27,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:27,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:46:27,320 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:27,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:27,483 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-02-19 17:46:27,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:27,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:27,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:27,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:46:27,494 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:27,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:27,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:46:27,502 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:27,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:27,658 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-02-19 17:46:27,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:27,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:27,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:27,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:46:27,668 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:27,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:27,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-02-19 17:46:27,676 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:27,815 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-02-19 17:46:27,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:27,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:27,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:27,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-02-19 17:46:27,825 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:27,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:27,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:46:27,833 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:27,968 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-02-19 17:46:27,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:27,973 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 10 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-02-19 17:46:27,973 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 15 variables, input treesize:313, output treesize:70 [2021-02-19 17:46:28,094 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:28,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:28,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-02-19 17:46:28,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523675986] [2021-02-19 17:46:28,095 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:46:28,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:28,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:46:28,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:46:28,095 INFO L87 Difference]: Start difference. First operand 189 states and 561 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:28,464 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-02-19 17:46:28,848 WARN L202 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 71 [2021-02-19 17:46:29,556 WARN L202 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 87 [2021-02-19 17:46:30,163 WARN L202 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2021-02-19 17:46:30,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:30,335 INFO L93 Difference]: Finished difference Result 259 states and 743 transitions. [2021-02-19 17:46:30,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:46:30,336 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:46:30,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:30,337 INFO L225 Difference]: With dead ends: 259 [2021-02-19 17:46:30,337 INFO L226 Difference]: Without dead ends: 255 [2021-02-19 17:46:30,337 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:46:30,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-02-19 17:46:30,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 183. [2021-02-19 17:46:30,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.9505494505494507) internal successors, (537), 182 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:30,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 537 transitions. [2021-02-19 17:46:30,339 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 537 transitions. Word has length 17 [2021-02-19 17:46:30,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:30,340 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 537 transitions. [2021-02-19 17:46:30,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:30,340 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 537 transitions. [2021-02-19 17:46:30,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:30,340 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:30,340 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:30,540 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2262 [2021-02-19 17:46:30,540 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:30,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:30,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1633533243, now seen corresponding path program 59 times [2021-02-19 17:46:30,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:30,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462965008] [2021-02-19 17:46:30,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:30,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:30,712 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2021-02-19 17:46:31,089 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:31,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462965008] [2021-02-19 17:46:31,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299851627] [2021-02-19 17:46:31,089 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 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 [2021-02-19 17:46:31,108 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:46:31,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:31,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:46:31,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:31,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:31,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:31,518 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:46:31,521 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:31,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:31,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:46:31,529 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-02-19 17:46:31,635 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-02-19 17:46:31,636 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:31,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:31,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:31,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:46:31,645 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:31,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:31,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:46:31,654 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:31,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:31,760 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-02-19 17:46:31,760 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:137, output treesize:125 [2021-02-19 17:46:32,343 INFO L446 ElimStorePlain]: Different costs {0=[array_0, v_prenex_650, v_prenex_652, v_prenex_654], 1=[array_4, v_prenex_651, v_prenex_653, v_prenex_655]} [2021-02-19 17:46:32,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:46:32,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 17:46:32,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:46:32,365 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:32,722 WARN L202 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2021-02-19 17:46:32,723 INFO L628 ElimStorePlain]: treesize reduction 93, result has 70.7 percent of original size [2021-02-19 17:46:32,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-02-19 17:46:32,731 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:32,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-02-19 17:46:32,740 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:32,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:46:32,749 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:32,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-02-19 17:46:32,757 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:32,891 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-02-19 17:46:32,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:32,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-02-19 17:46:32,900 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:33,027 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-02-19 17:46:33,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:33,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:46:33,036 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-02-19 17:46:33,173 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-02-19 17:46:33,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:33,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:33,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:33,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:46:33,184 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:33,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:33,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:46:33,192 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:33,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:33,354 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-02-19 17:46:33,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:33,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:33,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:33,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-02-19 17:46:33,365 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:33,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:33,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:33,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-02-19 17:46:33,376 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:33,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:33,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:33,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:46:33,386 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:33,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:33,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:46:33,395 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:33,530 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-02-19 17:46:33,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:33,531 INFO L518 ElimStorePlain]: Eliminatee v_prenex_653 vanished before elimination [2021-02-19 17:46:33,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:33,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:33,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:46:33,541 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:33,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:33,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:46:33,549 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:33,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:33,702 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-02-19 17:46:33,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:33,706 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-02-19 17:46:33,707 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 12 variables, input treesize:313, output treesize:70 [2021-02-19 17:46:33,818 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:33,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:33,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-02-19 17:46:33,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242277829] [2021-02-19 17:46:33,819 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:46:33,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:33,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:46:33,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:46:33,819 INFO L87 Difference]: Start difference. First operand 183 states and 537 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:34,182 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-02-19 17:46:34,738 WARN L202 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-02-19 17:46:35,090 WARN L202 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 79 [2021-02-19 17:46:35,532 WARN L202 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 87 [2021-02-19 17:46:35,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:35,808 INFO L93 Difference]: Finished difference Result 219 states and 637 transitions. [2021-02-19 17:46:35,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:46:35,810 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:46:35,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:35,810 INFO L225 Difference]: With dead ends: 219 [2021-02-19 17:46:35,810 INFO L226 Difference]: Without dead ends: 215 [2021-02-19 17:46:35,810 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:46:35,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-02-19 17:46:35,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 185. [2021-02-19 17:46:35,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.9510869565217392) internal successors, (543), 184 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:35,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 543 transitions. [2021-02-19 17:46:35,812 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 543 transitions. Word has length 17 [2021-02-19 17:46:35,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:35,813 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 543 transitions. [2021-02-19 17:46:35,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:35,813 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 543 transitions. [2021-02-19 17:46:35,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:35,813 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:35,813 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:36,013 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2296,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:36,013 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:36,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:36,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1560160763, now seen corresponding path program 60 times [2021-02-19 17:46:36,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:36,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950064926] [2021-02-19 17:46:36,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:36,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:36,407 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 29 [2021-02-19 17:46:36,447 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:36,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950064926] [2021-02-19 17:46:36,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305949293] [2021-02-19 17:46:36,447 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 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 [2021-02-19 17:46:36,471 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:46:36,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:36,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:46:36,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:36,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:36,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:36,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:46:36,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:36,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:36,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:46:36,824 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-02-19 17:46:36,947 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-02-19 17:46:36,948 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:36,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:36,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:36,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:46:36,958 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:36,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:36,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:46:36,967 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:37,084 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-02-19 17:46:37,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:37,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-02-19 17:46:37,096 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:155, output treesize:145 [2021-02-19 17:46:37,433 INFO L446 ElimStorePlain]: Different costs {1=[array_0], 10=[array_2]} [2021-02-19 17:46:37,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:37,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:46:37,444 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:37,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:37,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:46:37,453 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-02-19 17:46:37,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:37,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:46:37,464 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:37,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:37,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-02-19 17:46:37,475 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-02-19 17:46:37,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:37,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-02-19 17:46:37,486 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-02-19 17:46:37,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:37,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:46:37,498 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:37,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:37,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:46:37,509 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:37,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:37,518 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:46:37,520 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:37,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:37,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:46:37,531 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:37,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-02-19 17:46:37,542 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 2 xjuncts. [2021-02-19 17:46:38,247 WARN L202 SmtUtils]: Spent 704.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 77 [2021-02-19 17:46:38,248 INFO L628 ElimStorePlain]: treesize reduction 156, result has 72.6 percent of original size [2021-02-19 17:46:38,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:38,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:38,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:46:38,259 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:38,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:38,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:38,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:46:38,270 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:38,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:38,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:38,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:46:38,280 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:38,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:38,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:38,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:38,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:46:38,313 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:38,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:38,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:38,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 15 [2021-02-19 17:46:38,324 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:38,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:38,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:38,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-02-19 17:46:38,335 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:38,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:38,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:38,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:38,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-02-19 17:46:38,382 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:38,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:38,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:38,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:46:38,394 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:38,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:38,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:38,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:46:38,404 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:38,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:38,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:38,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:38,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-02-19 17:46:38,438 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:38,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:38,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:46:38,447 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:38,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:38,762 WARN L202 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-02-19 17:46:38,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:38,767 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-02-19 17:46:38,767 INFO L247 ElimStorePlain]: Needed 22 recursive calls to eliminate 6 variables, input treesize:473, output treesize:213 [2021-02-19 17:46:39,145 WARN L202 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-02-19 17:46:39,294 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:39,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:39,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:46:39,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961207802] [2021-02-19 17:46:39,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:46:39,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:39,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:46:39,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:46:39,294 INFO L87 Difference]: Start difference. First operand 185 states and 543 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:39,699 WARN L202 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-02-19 17:46:39,872 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-02-19 17:46:40,303 WARN L202 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-02-19 17:46:41,003 WARN L202 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 94 [2021-02-19 17:46:41,450 WARN L202 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-02-19 17:46:41,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:41,753 INFO L93 Difference]: Finished difference Result 216 states and 629 transitions. [2021-02-19 17:46:41,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:46:41,755 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:46:41,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:41,755 INFO L225 Difference]: With dead ends: 216 [2021-02-19 17:46:41,755 INFO L226 Difference]: Without dead ends: 212 [2021-02-19 17:46:41,755 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:46:41,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-02-19 17:46:41,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 179. [2021-02-19 17:46:41,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.949438202247191) internal successors, (525), 178 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:41,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 525 transitions. [2021-02-19 17:46:41,757 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 525 transitions. Word has length 17 [2021-02-19 17:46:41,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:41,758 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 525 transitions. [2021-02-19 17:46:41,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:41,758 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 525 transitions. [2021-02-19 17:46:41,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:41,758 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:41,758 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:41,969 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2337 [2021-02-19 17:46:41,970 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:41,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:41,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1698524357, now seen corresponding path program 61 times [2021-02-19 17:46:41,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:41,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36165135] [2021-02-19 17:46:41,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:41,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:42,433 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-02-19 17:46:42,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:42,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36165135] [2021-02-19 17:46:42,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170087414] [2021-02-19 17:46:42,572 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 [2021-02-19 17:46:42,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:42,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:46:42,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:42,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:46:42,804 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:42,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:46:42,811 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-02-19 17:46:42,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:46:42,819 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:42,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:46:42,826 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:42,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:42,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-02-19 17:46:42,911 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:123, output treesize:111 [2021-02-19 17:46:43,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:43,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:46:43,119 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 17:46:43,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:43,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:46:43,128 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-02-19 17:46:43,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:43,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:46:43,138 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:43,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:43,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-02-19 17:46:43,148 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-02-19 17:46:43,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:43,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-02-19 17:46:43,158 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-02-19 17:46:43,164 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 17:46:43,166 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:43,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:43,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:46:43,176 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:43,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:43,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-02-19 17:46:43,185 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:43,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:43,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:46:43,195 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:43,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:46:43,203 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:43,630 WARN L202 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2021-02-19 17:46:43,631 INFO L628 ElimStorePlain]: treesize reduction 177, result has 57.8 percent of original size [2021-02-19 17:46:43,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:43,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-02-19 17:46:43,640 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:43,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:43,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:46:43,648 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:43,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:43,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:46:43,657 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:43,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:43,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:46:43,666 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:43,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:43,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:43,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:46:43,696 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:43,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:43,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-02-19 17:46:43,705 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:43,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:43,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:46:43,713 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:43,740 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:43,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:43,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:46:43,749 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:43,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:46:43,756 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:43,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:43,956 WARN L202 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-02-19 17:46:43,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:43,958 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-02-19 17:46:43,958 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 2 variables, input treesize:343, output treesize:143 [2021-02-19 17:46:44,173 WARN L202 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-02-19 17:46:44,312 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:44,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:44,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-02-19 17:46:44,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377505696] [2021-02-19 17:46:44,312 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:46:44,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:44,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:46:44,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:46:44,313 INFO L87 Difference]: Start difference. First operand 179 states and 525 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:44,794 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-02-19 17:46:45,162 WARN L202 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2021-02-19 17:46:45,722 WARN L202 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-02-19 17:46:45,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:45,818 INFO L93 Difference]: Finished difference Result 210 states and 610 transitions. [2021-02-19 17:46:45,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 17:46:45,819 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:46:45,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:45,820 INFO L225 Difference]: With dead ends: 210 [2021-02-19 17:46:45,820 INFO L226 Difference]: Without dead ends: 206 [2021-02-19 17:46:45,820 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:46:45,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-02-19 17:46:45,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 183. [2021-02-19 17:46:45,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.9505494505494507) internal successors, (537), 182 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:45,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 537 transitions. [2021-02-19 17:46:45,822 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 537 transitions. Word has length 17 [2021-02-19 17:46:45,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:45,822 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 537 transitions. [2021-02-19 17:46:45,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:45,822 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 537 transitions. [2021-02-19 17:46:45,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:45,822 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:45,822 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:46,024 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2375 [2021-02-19 17:46:46,024 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:46,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:46,024 INFO L82 PathProgramCache]: Analyzing trace with hash -217286487, now seen corresponding path program 62 times [2021-02-19 17:46:46,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:46,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467708613] [2021-02-19 17:46:46,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:46,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:46,449 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:46,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467708613] [2021-02-19 17:46:46,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577822361] [2021-02-19 17:46:46,449 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 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 [2021-02-19 17:46:46,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:46:46,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:46,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:46:46,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:46,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:46,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:46,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:46:46,872 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:46,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:46,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:46,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:46:46,884 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:46,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:46,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:46,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:46:46,895 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:46,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:46,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-02-19 17:46:46,905 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-02-19 17:46:47,135 WARN L202 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-02-19 17:46:47,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:47,154 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-02-19 17:46:47,154 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:199, output treesize:259 [2021-02-19 17:46:47,588 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 10=[array_2]} [2021-02-19 17:46:47,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:47,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:47,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-02-19 17:46:47,601 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:47,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:47,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:47,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:46:47,613 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:47,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:47,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:47,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:46:47,625 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:47,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:47,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:47,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:46:47,639 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-02-19 17:46:47,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:47,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:47,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:46:47,658 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-02-19 17:46:47,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:47,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:47,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:46:47,671 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:47,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:47,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:47,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-02-19 17:46:47,685 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:47,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:47,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:47,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 36 [2021-02-19 17:46:47,697 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:47,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:47,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:47,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:46:47,713 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:47,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:47,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:47,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:46:47,728 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:47,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:47,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:47,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 38 [2021-02-19 17:46:47,743 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:47,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:47,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:47,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-02-19 17:46:47,758 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:47,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:47,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:47,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:46:47,771 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:47,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:47,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:46:47,785 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:48,521 WARN L202 SmtUtils]: Spent 735.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 75 [2021-02-19 17:46:48,522 INFO L628 ElimStorePlain]: treesize reduction 290, result has 53.5 percent of original size [2021-02-19 17:46:48,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:48,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:48,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:46:48,533 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:48,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:48,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:48,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:46:48,545 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:48,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:48,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:48,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-02-19 17:46:48,557 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:48,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:48,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:48,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:48,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:46:48,593 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:48,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:48,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:48,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-02-19 17:46:48,605 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:48,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:48,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:48,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:46:48,617 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:48,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:48,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:48,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:46:48,629 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:48,652 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:48,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:48,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:48,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:46:48,664 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:48,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:48,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:46:48,674 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:48,959 WARN L202 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-02-19 17:46:48,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:48,965 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-02-19 17:46:48,965 INFO L247 ElimStorePlain]: Needed 24 recursive calls to eliminate 7 variables, input treesize:689, output treesize:139 [2021-02-19 17:46:49,176 WARN L202 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-02-19 17:46:49,324 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:49,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:49,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-02-19 17:46:49,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880344006] [2021-02-19 17:46:49,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:46:49,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:49,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:46:49,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:46:49,325 INFO L87 Difference]: Start difference. First operand 183 states and 537 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:49,670 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-02-19 17:46:50,164 WARN L202 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-02-19 17:46:50,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:50,262 INFO L93 Difference]: Finished difference Result 219 states and 624 transitions. [2021-02-19 17:46:50,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:46:50,264 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:46:50,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:50,264 INFO L225 Difference]: With dead ends: 219 [2021-02-19 17:46:50,264 INFO L226 Difference]: Without dead ends: 215 [2021-02-19 17:46:50,264 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:46:50,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-02-19 17:46:50,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 186. [2021-02-19 17:46:50,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.9675675675675675) internal successors, (549), 185 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:50,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 549 transitions. [2021-02-19 17:46:50,267 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 549 transitions. Word has length 17 [2021-02-19 17:46:50,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:50,267 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 549 transitions. [2021-02-19 17:46:50,267 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:50,267 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 549 transitions. [2021-02-19 17:46:50,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:50,267 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:50,267 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:50,467 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2393,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:46:50,468 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:50,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:50,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1888262503, now seen corresponding path program 63 times [2021-02-19 17:46:50,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:50,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503280117] [2021-02-19 17:46:50,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:50,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:50,890 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:50,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503280117] [2021-02-19 17:46:50,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113964383] [2021-02-19 17:46:50,891 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 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 [2021-02-19 17:46:50,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 17:46:50,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:50,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:46:50,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:51,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:46:51,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:51,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:46:51,314 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:51,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:46:51,322 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-02-19 17:46:51,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:46:51,329 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:51,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:46:51,337 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:51,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:46:51,344 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:51,512 WARN L202 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-02-19 17:46:51,513 INFO L628 ElimStorePlain]: treesize reduction 18, result has 85.8 percent of original size [2021-02-19 17:46:51,515 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-02-19 17:46:51,515 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:151, output treesize:109 [2021-02-19 17:46:51,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17 [2021-02-19 17:46:51,712 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:51,718 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 30 treesize of output 24 [2021-02-19 17:46:51,720 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:51,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:46:51,728 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:51,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:46:51,736 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:51,839 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 23 [2021-02-19 17:46:51,840 INFO L628 ElimStorePlain]: treesize reduction 73, result has 36.5 percent of original size [2021-02-19 17:46:51,840 INFO L518 ElimStorePlain]: Eliminatee v_prenex_669 vanished before elimination [2021-02-19 17:46:51,840 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:46:51,840 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-02-19 17:46:51,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:46:51,847 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:51,873 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:51,873 INFO L518 ElimStorePlain]: Eliminatee v_prenex_667 vanished before elimination [2021-02-19 17:46:51,874 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-02-19 17:46:51,875 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:187, output treesize:26 [2021-02-19 17:46:51,955 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:51,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:51,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-02-19 17:46:51,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127718623] [2021-02-19 17:46:51,956 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:46:51,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:51,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:46:51,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:46:51,959 INFO L87 Difference]: Start difference. First operand 186 states and 549 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:52,449 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2021-02-19 17:46:52,724 WARN L202 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2021-02-19 17:46:53,194 WARN L202 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2021-02-19 17:46:53,402 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-02-19 17:46:53,709 WARN L202 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 47 [2021-02-19 17:46:53,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:53,944 INFO L93 Difference]: Finished difference Result 219 states and 616 transitions. [2021-02-19 17:46:53,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:46:53,946 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:46:53,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:53,946 INFO L225 Difference]: With dead ends: 219 [2021-02-19 17:46:53,947 INFO L226 Difference]: Without dead ends: 211 [2021-02-19 17:46:53,947 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:46:53,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-02-19 17:46:53,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 180. [2021-02-19 17:46:53,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.9497206703910615) internal successors, (528), 179 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:53,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 528 transitions. [2021-02-19 17:46:53,949 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 528 transitions. Word has length 17 [2021-02-19 17:46:53,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:53,949 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 528 transitions. [2021-02-19 17:46:53,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:53,949 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 528 transitions. [2021-02-19 17:46:53,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:53,949 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:53,949 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:54,149 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2421 [2021-02-19 17:46:54,149 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:54,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:54,150 INFO L82 PathProgramCache]: Analyzing trace with hash 331629923, now seen corresponding path program 64 times [2021-02-19 17:46:54,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:54,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332351725] [2021-02-19 17:46:54,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:54,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:54,482 WARN L202 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2021-02-19 17:46:54,687 WARN L202 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-02-19 17:46:54,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:54,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332351725] [2021-02-19 17:46:54,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636221274] [2021-02-19 17:46:54,888 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 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 [2021-02-19 17:46:54,906 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:46:54,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:46:54,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:46:54,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:46:55,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:46:55,105 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:55,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:46:55,113 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-02-19 17:46:55,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:46:55,120 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:55,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:46:55,128 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:55,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:55,215 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-02-19 17:46:55,215 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:123, output treesize:111 [2021-02-19 17:46:55,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:55,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:46:55,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 17:46:55,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:55,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:46:55,438 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-02-19 17:46:55,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:55,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:46:55,448 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:55,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:55,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-02-19 17:46:55,458 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-02-19 17:46:55,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:55,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-02-19 17:46:55,472 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-02-19 17:46:55,477 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 17:46:55,479 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:55,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:55,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:46:55,489 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:55,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:55,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-02-19 17:46:55,498 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:55,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:55,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:46:55,507 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:55,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:46:55,515 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:55,959 WARN L202 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2021-02-19 17:46:55,960 INFO L628 ElimStorePlain]: treesize reduction 177, result has 57.8 percent of original size [2021-02-19 17:46:55,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:55,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-02-19 17:46:55,969 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:55,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:55,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:46:55,979 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:55,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:55,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:46:55,988 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:55,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:55,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:46:55,997 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:56,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:56,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:56,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:46:56,029 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:56,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:56,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-02-19 17:46:56,038 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:56,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:56,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:46:56,046 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:56,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:56,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:46:56,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:46:56,084 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:56,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:46:56,092 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-02-19 17:46:56,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:56,297 WARN L202 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-02-19 17:46:56,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:46:56,300 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-02-19 17:46:56,300 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 2 variables, input treesize:343, output treesize:143 [2021-02-19 17:46:56,526 WARN L202 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-02-19 17:46:56,667 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:46:56,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:46:56,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-02-19 17:46:56,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983634164] [2021-02-19 17:46:56,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:46:56,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:46:56,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:46:56,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:46:56,668 INFO L87 Difference]: Start difference. First operand 180 states and 528 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:57,137 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-02-19 17:46:57,564 WARN L202 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2021-02-19 17:46:58,074 WARN L202 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2021-02-19 17:46:58,632 WARN L202 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-02-19 17:46:58,954 WARN L202 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-02-19 17:46:59,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:46:59,118 INFO L93 Difference]: Finished difference Result 214 states and 624 transitions. [2021-02-19 17:46:59,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:46:59,119 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:46:59,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:46:59,120 INFO L225 Difference]: With dead ends: 214 [2021-02-19 17:46:59,120 INFO L226 Difference]: Without dead ends: 210 [2021-02-19 17:46:59,120 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:46:59,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-02-19 17:46:59,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 182. [2021-02-19 17:46:59,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.9502762430939224) internal successors, (534), 181 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:59,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 534 transitions. [2021-02-19 17:46:59,122 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 534 transitions. Word has length 17 [2021-02-19 17:46:59,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:46:59,122 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 534 transitions. [2021-02-19 17:46:59,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:46:59,122 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 534 transitions. [2021-02-19 17:46:59,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:46:59,122 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:46:59,122 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:46:59,322 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2444 [2021-02-19 17:46:59,323 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:46:59,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:46:59,323 INFO L82 PathProgramCache]: Analyzing trace with hash -483176231, now seen corresponding path program 65 times [2021-02-19 17:46:59,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:46:59,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448691480] [2021-02-19 17:46:59,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:46:59,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:46:59,567 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-02-19 17:46:59,842 WARN L202 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-02-19 17:47:00,079 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:00,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448691480] [2021-02-19 17:47:00,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601576411] [2021-02-19 17:47:00,080 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 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 [2021-02-19 17:47:00,099 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:47:00,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:00,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:47:00,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:00,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:00,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:47:00,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:00,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:00,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:47:00,327 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:00,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:00,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:47:00,335 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:00,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:47:00,343 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-02-19 17:47:00,462 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-02-19 17:47:00,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:00,465 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-02-19 17:47:00,465 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:145, output treesize:135 [2021-02-19 17:47:00,620 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-02-19 17:47:00,690 INFO L446 ElimStorePlain]: Different costs {0=[array_2, v_prenex_671, v_prenex_673, v_prenex_675], 1=[array_0, v_prenex_670, v_prenex_672, v_prenex_674]} [2021-02-19 17:47:00,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:47:00,700 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:00,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-02-19 17:47:00,709 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-02-19 17:47:01,201 WARN L202 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 64 [2021-02-19 17:47:01,202 INFO L628 ElimStorePlain]: treesize reduction 147, result has 64.8 percent of original size [2021-02-19 17:47:01,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:47:01,210 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:01,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:47:01,219 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-02-19 17:47:01,443 WARN L202 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-02-19 17:47:01,444 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:01,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-02-19 17:47:01,453 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:01,861 WARN L202 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-02-19 17:47:01,862 INFO L628 ElimStorePlain]: treesize reduction 23, result has 91.4 percent of original size [2021-02-19 17:47:01,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:47:01,871 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:01,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:47:01,880 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:01,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17 [2021-02-19 17:47:01,889 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:01,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-02-19 17:47:01,898 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 2 xjuncts. [2021-02-19 17:47:02,327 WARN L202 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 61 [2021-02-19 17:47:02,328 INFO L628 ElimStorePlain]: treesize reduction 10, result has 96.1 percent of original size [2021-02-19 17:47:02,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:02,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:47:02,337 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:02,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:47:02,346 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:02,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:02,569 WARN L202 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-02-19 17:47:02,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:02,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:02,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-02-19 17:47:02,579 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:02,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:47:02,587 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:02,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:02,800 WARN L202 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-02-19 17:47:02,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:02,801 INFO L518 ElimStorePlain]: Eliminatee v_prenex_672 vanished before elimination [2021-02-19 17:47:02,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:02,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:47:02,810 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:02,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:02,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:47:02,821 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:02,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:02,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-02-19 17:47:02,830 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:02,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:02,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:47:02,838 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:02,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:02,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:47:02,874 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:03,059 WARN L202 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-02-19 17:47:03,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:03,062 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-02-19 17:47:03,062 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 8 variables, input treesize:344, output treesize:140 [2021-02-19 17:47:03,288 WARN L202 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-02-19 17:47:03,452 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:03,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:03,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-02-19 17:47:03,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290998477] [2021-02-19 17:47:03,452 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:47:03,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:03,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:47:03,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:47:03,453 INFO L87 Difference]: Start difference. First operand 182 states and 534 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:04,038 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-02-19 17:47:04,790 WARN L202 SmtUtils]: Spent 590.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2021-02-19 17:47:05,322 WARN L202 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2021-02-19 17:47:05,962 WARN L202 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2021-02-19 17:47:06,512 WARN L202 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2021-02-19 17:47:06,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:06,727 INFO L93 Difference]: Finished difference Result 214 states and 613 transitions. [2021-02-19 17:47:06,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:47:06,729 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:47:06,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:06,730 INFO L225 Difference]: With dead ends: 214 [2021-02-19 17:47:06,730 INFO L226 Difference]: Without dead ends: 206 [2021-02-19 17:47:06,730 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:47:06,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-02-19 17:47:06,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 180. [2021-02-19 17:47:06,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.9497206703910615) internal successors, (528), 179 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:06,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 528 transitions. [2021-02-19 17:47:06,732 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 528 transitions. Word has length 17 [2021-02-19 17:47:06,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:06,732 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 528 transitions. [2021-02-19 17:47:06,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:06,732 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 528 transitions. [2021-02-19 17:47:06,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:06,732 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:06,732 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:06,932 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2462,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:06,933 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:06,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:06,933 INFO L82 PathProgramCache]: Analyzing trace with hash 538722905, now seen corresponding path program 66 times [2021-02-19 17:47:06,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:06,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164425871] [2021-02-19 17:47:06,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:06,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:07,309 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-02-19 17:47:07,440 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2021-02-19 17:47:07,494 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:07,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164425871] [2021-02-19 17:47:07,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389922603] [2021-02-19 17:47:07,494 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 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 [2021-02-19 17:47:07,514 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:47:07,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:07,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:47:07,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:07,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:47:07,734 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:07,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:47:07,743 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-02-19 17:47:07,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:07,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:47:07,851 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:07,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:47:07,859 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:07,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:07,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-02-19 17:47:07,948 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:122, output treesize:112 [2021-02-19 17:47:08,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:08,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:08,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:47:08,528 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:08,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:08,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:08,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:47:08,541 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:08,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:08,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:08,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-02-19 17:47:08,554 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:08,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:08,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:47:08,565 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:08,789 WARN L202 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 53 [2021-02-19 17:47:08,790 INFO L628 ElimStorePlain]: treesize reduction 144, result has 45.5 percent of original size [2021-02-19 17:47:08,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:08,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:47:08,800 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-02-19 17:47:08,900 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-02-19 17:47:08,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:08,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:08,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:08,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:47:08,912 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:08,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:08,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:47:08,920 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:09,021 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-02-19 17:47:09,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:09,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:09,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:09,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:47:09,032 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:09,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:09,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:47:09,042 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:09,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:09,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:09,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:09,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:47:09,171 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 2 xjuncts. [2021-02-19 17:47:09,288 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-02-19 17:47:09,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:09,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:09,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:09,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:47:09,300 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:09,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:09,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-02-19 17:47:09,308 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:09,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:09,447 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-02-19 17:47:09,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:09,448 INFO L518 ElimStorePlain]: Eliminatee v_prenex_677 vanished before elimination [2021-02-19 17:47:09,448 INFO L518 ElimStorePlain]: Eliminatee v_prenex_678 vanished before elimination [2021-02-19 17:47:09,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-02-19 17:47:09,452 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 12 variables, input treesize:293, output treesize:52 [2021-02-19 17:47:09,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:09,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:09,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-02-19 17:47:09,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907099104] [2021-02-19 17:47:09,592 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:47:09,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:09,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:47:09,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:47:09,592 INFO L87 Difference]: Start difference. First operand 180 states and 528 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:10,062 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-02-19 17:47:10,410 WARN L202 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2021-02-19 17:47:10,831 WARN L202 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2021-02-19 17:47:11,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:11,031 INFO L93 Difference]: Finished difference Result 208 states and 605 transitions. [2021-02-19 17:47:11,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:47:11,033 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:47:11,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:11,034 INFO L225 Difference]: With dead ends: 208 [2021-02-19 17:47:11,034 INFO L226 Difference]: Without dead ends: 204 [2021-02-19 17:47:11,034 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:47:11,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-02-19 17:47:11,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 182. [2021-02-19 17:47:11,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.9502762430939224) internal successors, (534), 181 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:11,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 534 transitions. [2021-02-19 17:47:11,036 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 534 transitions. Word has length 17 [2021-02-19 17:47:11,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:11,036 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 534 transitions. [2021-02-19 17:47:11,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:11,036 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 534 transitions. [2021-02-19 17:47:11,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:11,036 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:11,037 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:11,237 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2483,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:11,237 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:11,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:11,237 INFO L82 PathProgramCache]: Analyzing trace with hash 881306417, now seen corresponding path program 67 times [2021-02-19 17:47:11,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:11,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360237118] [2021-02-19 17:47:11,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:11,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:11,593 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-02-19 17:47:11,701 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:11,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360237118] [2021-02-19 17:47:11,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326660137] [2021-02-19 17:47:11,701 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 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 [2021-02-19 17:47:11,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:11,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:47:11,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:11,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:11,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:47:11,967 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 17:47:11,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:11,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:47:11,975 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:11,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:11,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:47:11,983 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:11,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:47:11,991 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:12,105 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-02-19 17:47:12,105 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:12,108 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-02-19 17:47:12,108 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:137, output treesize:127 [2021-02-19 17:47:12,263 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-02-19 17:47:12,331 INFO L446 ElimStorePlain]: Different costs {0=[array_2, v_prenex_691, v_prenex_687, v_prenex_689], 1=[array_0, v_prenex_690, v_prenex_686, v_prenex_688]} [2021-02-19 17:47:12,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:47:12,340 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:12,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-02-19 17:47:12,350 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-02-19 17:47:12,821 WARN L202 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 64 [2021-02-19 17:47:12,822 INFO L628 ElimStorePlain]: treesize reduction 147, result has 64.8 percent of original size [2021-02-19 17:47:12,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-02-19 17:47:12,831 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-02-19 17:47:12,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:47:12,841 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:12,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:47:12,851 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:12,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:47:12,860 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:13,306 WARN L202 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 68 [2021-02-19 17:47:13,307 INFO L628 ElimStorePlain]: treesize reduction 10, result has 96.5 percent of original size [2021-02-19 17:47:13,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:47:13,316 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-02-19 17:47:13,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:47:13,325 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:13,558 WARN L202 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-02-19 17:47:13,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:13,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-02-19 17:47:13,568 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:13,968 WARN L202 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-02-19 17:47:13,969 INFO L628 ElimStorePlain]: treesize reduction 23, result has 91.4 percent of original size [2021-02-19 17:47:13,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:13,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:47:13,978 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:13,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:47:13,986 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:14,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:14,201 WARN L202 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-02-19 17:47:14,202 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:14,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:14,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:47:14,211 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:14,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:14,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-02-19 17:47:14,221 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:14,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:14,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:47:14,230 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:14,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:14,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:14,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:47:14,270 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:14,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:47:14,278 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:14,470 WARN L202 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-02-19 17:47:14,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:14,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:14,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-02-19 17:47:14,480 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:14,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:47:14,488 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:14,507 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:14,697 WARN L202 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-02-19 17:47:14,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:14,698 INFO L518 ElimStorePlain]: Eliminatee v_prenex_688 vanished before elimination [2021-02-19 17:47:14,701 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-02-19 17:47:14,701 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 8 variables, input treesize:344, output treesize:140 [2021-02-19 17:47:14,931 WARN L202 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-02-19 17:47:15,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:15,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:15,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-02-19 17:47:15,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395291708] [2021-02-19 17:47:15,103 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:47:15,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:15,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:47:15,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:47:15,104 INFO L87 Difference]: Start difference. First operand 182 states and 534 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:15,696 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-02-19 17:47:16,173 WARN L202 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-02-19 17:47:16,473 WARN L202 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-02-19 17:47:17,047 WARN L202 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2021-02-19 17:47:17,608 WARN L202 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2021-02-19 17:47:18,369 WARN L202 SmtUtils]: Spent 675.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2021-02-19 17:47:18,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:18,489 INFO L93 Difference]: Finished difference Result 214 states and 613 transitions. [2021-02-19 17:47:18,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:47:18,490 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:47:18,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:18,491 INFO L225 Difference]: With dead ends: 214 [2021-02-19 17:47:18,491 INFO L226 Difference]: Without dead ends: 206 [2021-02-19 17:47:18,491 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:47:18,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-02-19 17:47:18,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 177. [2021-02-19 17:47:18,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.9488636363636362) internal successors, (519), 176 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:18,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 519 transitions. [2021-02-19 17:47:18,493 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 519 transitions. Word has length 17 [2021-02-19 17:47:18,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:18,493 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 519 transitions. [2021-02-19 17:47:18,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:18,493 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 519 transitions. [2021-02-19 17:47:18,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:18,494 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:18,494 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:18,694 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2543,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:18,694 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:18,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:18,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1017507975, now seen corresponding path program 68 times [2021-02-19 17:47:18,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:18,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544493506] [2021-02-19 17:47:18,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:18,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:18,982 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2021-02-19 17:47:19,184 WARN L202 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-02-19 17:47:19,321 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2021-02-19 17:47:19,579 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:19,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544493506] [2021-02-19 17:47:19,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521989813] [2021-02-19 17:47:19,579 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 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 [2021-02-19 17:47:19,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:47:19,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:19,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:47:19,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:19,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:19,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:19,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:47:19,872 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:19,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:19,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:19,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:47:19,883 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:19,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:19,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:19,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:47:19,894 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:19,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:19,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-02-19 17:47:19,904 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-02-19 17:47:20,089 WARN L202 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-02-19 17:47:20,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:20,106 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-02-19 17:47:20,106 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:159, output treesize:215 [2021-02-19 17:47:20,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:47:20,533 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:20,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-02-19 17:47:20,541 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:20,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:47:20,549 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-02-19 17:47:20,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-02-19 17:47:20,557 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:20,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:47:20,566 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-02-19 17:47:20,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:47:20,574 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-02-19 17:47:20,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:47:20,583 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:20,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:47:20,591 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:20,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:47:20,599 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:20,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:47:20,608 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:20,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-02-19 17:47:20,616 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:20,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:47:20,624 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:20,627 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 17:47:20,629 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:20,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:47:20,637 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:20,639 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 17:47:20,646 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:20,742 INFO L628 ElimStorePlain]: treesize reduction 90, result has 22.4 percent of original size [2021-02-19 17:47:20,742 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-02-19 17:47:20,743 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-02-19 17:47:20,743 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:351, output treesize:26 [2021-02-19 17:47:20,825 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:20,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:20,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-02-19 17:47:20,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781173967] [2021-02-19 17:47:20,825 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:47:20,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:20,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:47:20,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:47:20,826 INFO L87 Difference]: Start difference. First operand 177 states and 519 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:21,179 WARN L202 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 36 [2021-02-19 17:47:21,822 WARN L202 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 92 [2021-02-19 17:47:22,444 WARN L202 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 93 [2021-02-19 17:47:23,262 WARN L202 SmtUtils]: Spent 543.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 95 [2021-02-19 17:47:23,938 WARN L202 SmtUtils]: Spent 528.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 100 [2021-02-19 17:47:24,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:24,115 INFO L93 Difference]: Finished difference Result 291 states and 827 transitions. [2021-02-19 17:47:24,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:47:24,117 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:47:24,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:24,117 INFO L225 Difference]: With dead ends: 291 [2021-02-19 17:47:24,117 INFO L226 Difference]: Without dead ends: 287 [2021-02-19 17:47:24,118 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:47:24,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-02-19 17:47:24,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 189. [2021-02-19 17:47:24,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.973404255319149) internal successors, (559), 188 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:24,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 559 transitions. [2021-02-19 17:47:24,120 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 559 transitions. Word has length 17 [2021-02-19 17:47:24,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:24,120 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 559 transitions. [2021-02-19 17:47:24,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:24,120 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 559 transitions. [2021-02-19 17:47:24,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:24,120 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:24,120 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:24,321 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2563 [2021-02-19 17:47:24,321 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:24,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:24,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1698859931, now seen corresponding path program 69 times [2021-02-19 17:47:24,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:24,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33788347] [2021-02-19 17:47:24,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:24,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:24,587 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-02-19 17:47:24,753 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-02-19 17:47:24,890 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-02-19 17:47:25,028 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-02-19 17:47:25,225 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:25,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33788347] [2021-02-19 17:47:25,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76069068] [2021-02-19 17:47:25,225 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 [2021-02-19 17:47:25,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 17:47:25,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:25,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:47:25,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:25,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:25,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:25,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:47:25,523 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:25,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:25,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:25,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:47:25,534 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:25,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:25,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:25,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:47:25,545 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:25,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:25,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-02-19 17:47:25,555 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-02-19 17:47:25,742 WARN L202 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-02-19 17:47:25,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:25,759 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-02-19 17:47:25,759 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:159, output treesize:215 [2021-02-19 17:47:26,361 WARN L202 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-02-19 17:47:26,687 WARN L202 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 55 [2021-02-19 17:47:27,019 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_703, array_0, v_prenex_705], 1=[v_prenex_704, v_prenex_706, array_4]} [2021-02-19 17:47:27,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:47:27,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 17:47:27,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:47:27,039 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:27,182 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 33 [2021-02-19 17:47:27,183 INFO L628 ElimStorePlain]: treesize reduction 149, result has 28.7 percent of original size [2021-02-19 17:47:27,183 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-02-19 17:47:27,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:47:27,190 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-02-19 17:47:27,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:27,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:27,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:47:27,256 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:27,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:27,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:27,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:27,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:47:27,325 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:27,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:27,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:47:27,333 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:27,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:27,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:27,413 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-02-19 17:47:27,416 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-02-19 17:47:27,417 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 9 variables, input treesize:205, output treesize:26 [2021-02-19 17:47:27,506 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:27,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:27,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-02-19 17:47:27,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472687738] [2021-02-19 17:47:27,506 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:47:27,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:27,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:47:27,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:47:27,507 INFO L87 Difference]: Start difference. First operand 189 states and 559 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:27,880 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 30 [2021-02-19 17:47:28,530 WARN L202 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 93 [2021-02-19 17:47:30,067 WARN L202 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 126 DAG size of output: 105 [2021-02-19 17:47:31,474 WARN L202 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 158 DAG size of output: 101 [2021-02-19 17:47:32,317 WARN L202 SmtUtils]: Spent 543.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 103 [2021-02-19 17:47:32,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:32,447 INFO L93 Difference]: Finished difference Result 302 states and 859 transitions. [2021-02-19 17:47:32,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:47:32,449 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:47:32,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:32,450 INFO L225 Difference]: With dead ends: 302 [2021-02-19 17:47:32,450 INFO L226 Difference]: Without dead ends: 298 [2021-02-19 17:47:32,450 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:47:32,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-02-19 17:47:32,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 191. [2021-02-19 17:47:32,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.9842105263157896) internal successors, (567), 190 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:32,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 567 transitions. [2021-02-19 17:47:32,453 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 567 transitions. Word has length 17 [2021-02-19 17:47:32,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:32,453 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 567 transitions. [2021-02-19 17:47:32,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:32,453 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 567 transitions. [2021-02-19 17:47:32,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:32,453 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:32,453 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:32,653 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2584 [2021-02-19 17:47:32,653 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:32,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:32,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1945480103, now seen corresponding path program 70 times [2021-02-19 17:47:32,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:32,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675838019] [2021-02-19 17:47:32,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:32,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:32,924 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2021-02-19 17:47:33,110 WARN L202 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-02-19 17:47:33,262 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-02-19 17:47:33,431 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-02-19 17:47:33,557 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:33,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675838019] [2021-02-19 17:47:33,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082311673] [2021-02-19 17:47:33,557 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:33,576 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:47:33,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:33,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:47:33,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:33,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:33,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:33,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-02-19 17:47:33,879 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-02-19 17:47:33,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:33,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:33,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:47:33,891 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:33,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:33,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:33,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:47:33,903 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:33,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:33,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:47:33,914 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:34,171 WARN L202 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-02-19 17:47:34,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:34,189 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-02-19 17:47:34,189 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:209, output treesize:265 [2021-02-19 17:47:34,377 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-02-19 17:47:34,906 WARN L202 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-02-19 17:47:35,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:35,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:47:35,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:35,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-02-19 17:47:35,260 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:36,339 WARN L202 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 157 DAG size of output: 138 [2021-02-19 17:47:36,340 INFO L628 ElimStorePlain]: treesize reduction 306, result has 59.0 percent of original size [2021-02-19 17:47:36,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:36,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:36,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:47:36,356 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:36,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:36,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:47:36,370 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:36,795 WARN L202 SmtUtils]: Spent 424.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2021-02-19 17:47:36,796 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:36,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-02-19 17:47:36,808 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:37,674 WARN L202 SmtUtils]: Spent 865.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 126 [2021-02-19 17:47:37,675 INFO L628 ElimStorePlain]: treesize reduction 6, result has 98.5 percent of original size [2021-02-19 17:47:37,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-02-19 17:47:37,689 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:38,117 WARN L202 SmtUtils]: Spent 427.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-02-19 17:47:38,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:38,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:38,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:47:38,132 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:38,543 WARN L202 SmtUtils]: Spent 410.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-02-19 17:47:38,543 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:38,544 INFO L518 ElimStorePlain]: Eliminatee v_prenex_711 vanished before elimination [2021-02-19 17:47:38,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:47:38,556 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-02-19 17:47:38,996 WARN L202 SmtUtils]: Spent 439.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-02-19 17:47:38,996 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:39,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:47:39,009 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 2 xjuncts. [2021-02-19 17:47:39,458 WARN L202 SmtUtils]: Spent 449.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-02-19 17:47:39,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:39,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:39,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:39,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:47:39,473 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:39,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:39,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:47:39,486 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:39,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:39,961 WARN L202 SmtUtils]: Spent 446.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-02-19 17:47:39,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:39,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:39,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:39,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:47:39,977 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:39,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:39,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:47:39,990 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:40,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:40,464 WARN L202 SmtUtils]: Spent 446.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-02-19 17:47:40,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:40,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:40,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:47:40,479 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:40,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-02-19 17:47:40,491 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:41,362 WARN L202 SmtUtils]: Spent 870.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 97 [2021-02-19 17:47:41,363 INFO L628 ElimStorePlain]: treesize reduction 11, result has 96.9 percent of original size [2021-02-19 17:47:41,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:41,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:41,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:47:41,378 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:41,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:41,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:47:41,391 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:41,821 WARN L202 SmtUtils]: Spent 430.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-02-19 17:47:41,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:41,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-02-19 17:47:41,834 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:42,243 WARN L202 SmtUtils]: Spent 409.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-02-19 17:47:42,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:42,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:42,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 15 [2021-02-19 17:47:42,255 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:42,661 WARN L202 SmtUtils]: Spent 405.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-02-19 17:47:42,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:42,666 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 14 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-02-19 17:47:42,666 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 21 variables, input treesize:759, output treesize:233 [2021-02-19 17:47:43,180 WARN L202 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2021-02-19 17:47:43,442 WARN L202 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 19 [2021-02-19 17:47:43,478 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:43,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:43,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-02-19 17:47:43,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601826349] [2021-02-19 17:47:43,478 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:47:43,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:43,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:47:43,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:47:43,479 INFO L87 Difference]: Start difference. First operand 191 states and 567 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:43,799 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-02-19 17:47:44,179 WARN L202 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2021-02-19 17:47:45,208 WARN L202 SmtUtils]: Spent 729.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 106 [2021-02-19 17:47:48,752 WARN L202 SmtUtils]: Spent 3.04 s on a formula simplification. DAG size of input: 164 DAG size of output: 136 [2021-02-19 17:47:50,624 WARN L202 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 143 DAG size of output: 130 [2021-02-19 17:47:50,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:50,963 INFO L93 Difference]: Finished difference Result 304 states and 868 transitions. [2021-02-19 17:47:50,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 17:47:50,966 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:47:50,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:50,966 INFO L225 Difference]: With dead ends: 304 [2021-02-19 17:47:50,966 INFO L226 Difference]: Without dead ends: 300 [2021-02-19 17:47:50,966 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:47:50,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-02-19 17:47:50,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 185. [2021-02-19 17:47:50,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.9510869565217392) internal successors, (543), 184 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:50,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 543 transitions. [2021-02-19 17:47:50,969 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 543 transitions. Word has length 17 [2021-02-19 17:47:50,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:50,969 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 543 transitions. [2021-02-19 17:47:50,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:50,969 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 543 transitions. [2021-02-19 17:47:50,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:50,969 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:50,969 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:51,170 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2609 [2021-02-19 17:47:51,170 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:51,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:51,170 INFO L82 PathProgramCache]: Analyzing trace with hash -56409661, now seen corresponding path program 71 times [2021-02-19 17:47:51,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:51,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836108458] [2021-02-19 17:47:51,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:51,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:51,429 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-02-19 17:47:51,888 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:51,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836108458] [2021-02-19 17:47:51,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985691159] [2021-02-19 17:47:51,889 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:51,908 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:47:51,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:51,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:47:51,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:52,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:52,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:52,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:47:52,402 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:52,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:52,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:52,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-02-19 17:47:52,415 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-02-19 17:47:52,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:52,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:52,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:47:52,428 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:52,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:52,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:47:52,439 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:52,678 WARN L202 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-02-19 17:47:52,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:52,696 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-02-19 17:47:52,696 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:171, output treesize:227 [2021-02-19 17:47:52,906 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-02-19 17:47:53,254 WARN L202 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 55 [2021-02-19 17:47:53,608 INFO L446 ElimStorePlain]: Different costs {0=[array_0, v_prenex_730, v_prenex_732], 1=[array_4, v_prenex_731, v_prenex_733]} [2021-02-19 17:47:53,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:47:53,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:53,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-02-19 17:47:53,633 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:53,804 WARN L202 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 36 [2021-02-19 17:47:53,805 INFO L628 ElimStorePlain]: treesize reduction 121, result has 35.6 percent of original size [2021-02-19 17:47:53,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:47:53,814 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-02-19 17:47:53,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:53,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:47:53,894 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:53,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:53,965 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-02-19 17:47:53,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:53,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:53,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:47:53,977 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:53,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:53,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:47:53,987 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:54,016 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:54,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:54,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:54,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:47:54,090 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:54,152 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:54,156 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-02-19 17:47:54,156 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 9 variables, input treesize:205, output treesize:26 [2021-02-19 17:47:54,252 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:54,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:47:54,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-02-19 17:47:54,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738409834] [2021-02-19 17:47:54,252 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:47:54,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:47:54,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:47:54,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:47:54,252 INFO L87 Difference]: Start difference. First operand 185 states and 543 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:54,650 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 30 [2021-02-19 17:47:55,096 WARN L202 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2021-02-19 17:47:55,417 WARN L202 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-02-19 17:47:56,668 WARN L202 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 111 DAG size of output: 102 [2021-02-19 17:47:57,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:47:57,173 INFO L93 Difference]: Finished difference Result 260 states and 746 transitions. [2021-02-19 17:47:57,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:47:57,176 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:47:57,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:47:57,176 INFO L225 Difference]: With dead ends: 260 [2021-02-19 17:47:57,176 INFO L226 Difference]: Without dead ends: 256 [2021-02-19 17:47:57,176 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:47:57,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-02-19 17:47:57,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 189. [2021-02-19 17:47:57,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9627659574468086) internal successors, (557), 188 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:57,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 557 transitions. [2021-02-19 17:47:57,179 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 557 transitions. Word has length 17 [2021-02-19 17:47:57,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:47:57,179 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 557 transitions. [2021-02-19 17:47:57,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:47:57,179 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 557 transitions. [2021-02-19 17:47:57,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:47:57,179 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:47:57,179 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:47:57,379 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2654 [2021-02-19 17:47:57,379 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:47:57,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:47:57,380 INFO L82 PathProgramCache]: Analyzing trace with hash -303029833, now seen corresponding path program 72 times [2021-02-19 17:47:57,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:47:57,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204151299] [2021-02-19 17:47:57,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:47:57,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:47:57,641 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-02-19 17:47:58,089 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:47:58,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204151299] [2021-02-19 17:47:58,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466975781] [2021-02-19 17:47:58,090 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:47:58,109 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 17:47:58,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:47:58,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:47:58,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:47:58,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:58,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:58,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:47:58,597 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:58,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:58,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:58,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-02-19 17:47:58,610 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-02-19 17:47:58,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:58,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:58,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:47:58,623 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:58,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:58,631 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:47:58,634 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:58,884 WARN L202 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-02-19 17:47:58,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:47:58,903 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-02-19 17:47:58,903 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:171, output treesize:227 [2021-02-19 17:47:59,120 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-02-19 17:47:59,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:47:59,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:47:59,435 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:47:59,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:47:59,447 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:00,322 WARN L202 SmtUtils]: Spent 874.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 81 [2021-02-19 17:48:00,323 INFO L628 ElimStorePlain]: treesize reduction 219, result has 62.4 percent of original size [2021-02-19 17:48:00,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:48:00,335 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-02-19 17:48:00,743 WARN L202 SmtUtils]: Spent 407.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-02-19 17:48:00,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:00,744 INFO L518 ElimStorePlain]: Eliminatee v_prenex_738 vanished before elimination [2021-02-19 17:48:00,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:48:00,756 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-02-19 17:48:01,200 WARN L202 SmtUtils]: Spent 443.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-02-19 17:48:01,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:01,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:01,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:01,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:48:01,216 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:01,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:01,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:48:01,228 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:01,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:01,700 WARN L202 SmtUtils]: Spent 439.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-02-19 17:48:01,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:01,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:01,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:01,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:48:01,717 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:01,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:01,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:48:01,730 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:01,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:02,207 WARN L202 SmtUtils]: Spent 443.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-02-19 17:48:02,208 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:02,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:02,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-02-19 17:48:02,220 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:02,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:02,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:48:02,233 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:02,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:02,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-02-19 17:48:02,246 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:02,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:02,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:48:02,259 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:02,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:02,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-02-19 17:48:02,271 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:02,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-02-19 17:48:02,283 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:02,977 WARN L202 SmtUtils]: Spent 693.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2021-02-19 17:48:02,979 INFO L628 ElimStorePlain]: treesize reduction 57, result has 81.4 percent of original size [2021-02-19 17:48:02,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:02,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:02,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 15 [2021-02-19 17:48:02,993 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:03,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:03,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:03,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:48:03,007 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:03,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:03,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:03,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:48:03,021 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:03,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:03,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:03,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:48:03,036 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:03,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:03,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:48:03,048 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:03,366 WARN L202 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-02-19 17:48:03,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:03,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-02-19 17:48:03,374 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 12 variables, input treesize:597, output treesize:135 [2021-02-19 17:48:03,669 WARN L202 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-02-19 17:48:03,866 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:03,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:03,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-02-19 17:48:03,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214864539] [2021-02-19 17:48:03,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:48:03,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:03,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:48:03,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:48:03,867 INFO L87 Difference]: Start difference. First operand 189 states and 557 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:04,139 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 26 [2021-02-19 17:48:04,519 WARN L202 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2021-02-19 17:48:04,805 WARN L202 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-02-19 17:48:05,786 WARN L202 SmtUtils]: Spent 765.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2021-02-19 17:48:06,723 WARN L202 SmtUtils]: Spent 881.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-02-19 17:48:06,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:06,896 INFO L93 Difference]: Finished difference Result 271 states and 779 transitions. [2021-02-19 17:48:06,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:48:06,898 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:48:06,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:06,899 INFO L225 Difference]: With dead ends: 271 [2021-02-19 17:48:06,899 INFO L226 Difference]: Without dead ends: 267 [2021-02-19 17:48:06,899 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:48:06,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-02-19 17:48:06,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 187. [2021-02-19 17:48:06,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.9516129032258065) internal successors, (549), 186 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:06,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 549 transitions. [2021-02-19 17:48:06,901 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 549 transitions. Word has length 17 [2021-02-19 17:48:06,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:06,902 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 549 transitions. [2021-02-19 17:48:06,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:06,902 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 549 transitions. [2021-02-19 17:48:06,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:48:06,902 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:06,902 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:07,114 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2678 [2021-02-19 17:48:07,114 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:07,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:07,114 INFO L82 PathProgramCache]: Analyzing trace with hash -129782141, now seen corresponding path program 73 times [2021-02-19 17:48:07,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:07,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177045486] [2021-02-19 17:48:07,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:07,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:07,312 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-02-19 17:48:07,673 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 29 [2021-02-19 17:48:07,729 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:07,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177045486] [2021-02-19 17:48:07,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62198925] [2021-02-19 17:48:07,729 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:07,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:07,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:48:07,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:08,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:08,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:08,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:48:08,398 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:08,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:08,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:48:08,409 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-02-19 17:48:08,616 WARN L202 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-02-19 17:48:08,617 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:08,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:08,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:08,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:48:08,631 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:08,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:08,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:48:08,643 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:08,856 WARN L202 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-02-19 17:48:08,857 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:08,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-02-19 17:48:08,872 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:188, output treesize:178 [2021-02-19 17:48:09,063 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-02-19 17:48:09,349 INFO L446 ElimStorePlain]: Different costs {1=[array_0], 36=[array_2]} [2021-02-19 17:48:09,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:09,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-02-19 17:48:09,363 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-02-19 17:48:09,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:09,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:48:09,377 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:09,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:09,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-02-19 17:48:09,392 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-02-19 17:48:09,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:09,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:48:09,407 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:09,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:09,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:48:09,422 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:09,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:09,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-02-19 17:48:09,436 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 4 xjuncts. [2021-02-19 17:48:09,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:09,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:48:09,452 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:09,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:09,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-02-19 17:48:09,467 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-02-19 17:48:09,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:09,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:48:09,483 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:09,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:48:09,497 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:10,492 WARN L202 SmtUtils]: Spent 994.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 84 [2021-02-19 17:48:10,493 INFO L628 ElimStorePlain]: treesize reduction 282, result has 58.0 percent of original size [2021-02-19 17:48:10,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:10,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:10,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:48:10,508 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:10,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:10,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:10,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-02-19 17:48:10,524 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:10,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:10,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:10,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:10,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-02-19 17:48:10,578 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:10,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:10,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:10,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:48:10,594 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:10,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:10,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:10,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:10,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:48:10,644 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:10,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:10,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:10,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-02-19 17:48:10,660 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:10,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:10,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:10,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 15 [2021-02-19 17:48:10,675 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:10,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:10,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:10,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:10,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:48:10,739 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:10,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:10,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:10,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:48:10,755 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:10,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:10,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:48:10,768 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:10,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:11,227 WARN L202 SmtUtils]: Spent 426.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-02-19 17:48:11,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:11,232 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-02-19 17:48:11,232 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 10 variables, input treesize:505, output treesize:199 [2021-02-19 17:48:11,835 WARN L202 SmtUtils]: Spent 543.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-02-19 17:48:12,117 WARN L202 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2021-02-19 17:48:12,157 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:12,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:12,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:48:12,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976413310] [2021-02-19 17:48:12,157 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:48:12,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:12,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:48:12,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:48:12,158 INFO L87 Difference]: Start difference. First operand 187 states and 549 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:12,448 WARN L202 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-02-19 17:48:12,762 WARN L202 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-02-19 17:48:13,355 WARN L202 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2021-02-19 17:48:14,314 WARN L202 SmtUtils]: Spent 761.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 102 [2021-02-19 17:48:15,013 WARN L202 SmtUtils]: Spent 597.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2021-02-19 17:48:15,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:15,288 INFO L93 Difference]: Finished difference Result 261 states and 754 transitions. [2021-02-19 17:48:15,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 17:48:15,290 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:48:15,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:15,291 INFO L225 Difference]: With dead ends: 261 [2021-02-19 17:48:15,291 INFO L226 Difference]: Without dead ends: 257 [2021-02-19 17:48:15,291 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:48:15,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-02-19 17:48:15,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 181. [2021-02-19 17:48:15,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.95) internal successors, (531), 180 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:15,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 531 transitions. [2021-02-19 17:48:15,294 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 531 transitions. Word has length 17 [2021-02-19 17:48:15,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:15,294 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 531 transitions. [2021-02-19 17:48:15,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:15,294 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 531 transitions. [2021-02-19 17:48:15,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:48:15,294 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:15,294 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:15,508 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2714,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:15,508 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:15,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:15,508 INFO L82 PathProgramCache]: Analyzing trace with hash -28866395, now seen corresponding path program 74 times [2021-02-19 17:48:15,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:15,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383826563] [2021-02-19 17:48:15,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:15,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:15,676 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2021-02-19 17:48:15,904 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2021-02-19 17:48:16,080 WARN L202 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-02-19 17:48:16,268 WARN L202 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-02-19 17:48:16,408 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 22 [2021-02-19 17:48:16,513 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:16,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383826563] [2021-02-19 17:48:16,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405966183] [2021-02-19 17:48:16,514 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:16,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:48:16,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:16,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:48:16,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:17,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:17,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:17,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:48:17,090 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:17,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:17,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:17,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:48:17,103 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:17,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:17,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:17,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-02-19 17:48:17,118 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-02-19 17:48:17,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:17,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:48:17,130 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:17,399 WARN L202 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-02-19 17:48:17,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:17,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-02-19 17:48:17,420 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:171, output treesize:227 [2021-02-19 17:48:17,646 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-02-19 17:48:18,055 WARN L202 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 55 [2021-02-19 17:48:18,468 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_757, array_0, v_prenex_759], 1=[v_prenex_758, array_4, v_prenex_760]} [2021-02-19 17:48:18,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-02-19 17:48:18,480 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:18,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:48:18,491 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:18,674 WARN L202 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 36 [2021-02-19 17:48:18,675 INFO L628 ElimStorePlain]: treesize reduction 121, result has 35.6 percent of original size [2021-02-19 17:48:18,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:48:18,684 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:18,740 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:18,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:48:18,750 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-02-19 17:48:18,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:18,828 INFO L518 ElimStorePlain]: Eliminatee v_prenex_758 vanished before elimination [2021-02-19 17:48:18,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:18,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:48:18,838 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:18,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:18,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:18,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:18,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:48:18,925 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:18,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:18,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:48:18,936 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:18,967 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:19,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:19,042 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-02-19 17:48:19,043 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 9 variables, input treesize:205, output treesize:26 [2021-02-19 17:48:19,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:19,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:19,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-02-19 17:48:19,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179564702] [2021-02-19 17:48:19,152 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:48:19,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:19,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:48:19,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:48:19,153 INFO L87 Difference]: Start difference. First operand 181 states and 531 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:19,581 WARN L202 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-02-19 17:48:19,989 WARN L202 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 46 [2021-02-19 17:48:21,110 WARN L202 SmtUtils]: Spent 918.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 106 [2021-02-19 17:48:23,037 WARN L202 SmtUtils]: Spent 1.71 s on a formula simplification. DAG size of input: 146 DAG size of output: 113 [2021-02-19 17:48:23,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:23,518 INFO L93 Difference]: Finished difference Result 268 states and 768 transitions. [2021-02-19 17:48:23,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:48:23,521 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:48:23,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:23,522 INFO L225 Difference]: With dead ends: 268 [2021-02-19 17:48:23,522 INFO L226 Difference]: Without dead ends: 264 [2021-02-19 17:48:23,522 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:48:23,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-02-19 17:48:23,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 187. [2021-02-19 17:48:23,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.9623655913978495) internal successors, (551), 186 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:23,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 551 transitions. [2021-02-19 17:48:23,524 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 551 transitions. Word has length 17 [2021-02-19 17:48:23,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:23,525 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 551 transitions. [2021-02-19 17:48:23,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:23,525 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 551 transitions. [2021-02-19 17:48:23,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:48:23,525 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:23,525 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:23,737 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2759 [2021-02-19 17:48:23,738 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:23,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:23,738 INFO L82 PathProgramCache]: Analyzing trace with hash -275486567, now seen corresponding path program 75 times [2021-02-19 17:48:23,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:23,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126077377] [2021-02-19 17:48:23,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:23,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:23,905 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2021-02-19 17:48:24,273 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-02-19 17:48:24,463 WARN L202 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-02-19 17:48:24,693 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:24,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126077377] [2021-02-19 17:48:24,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136788124] [2021-02-19 17:48:24,694 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:24,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 17:48:24,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:24,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:48:24,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:25,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:25,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:25,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:48:25,315 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:25,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:25,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:25,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:48:25,329 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:25,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:25,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:25,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-02-19 17:48:25,343 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-02-19 17:48:25,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:25,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:48:25,356 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:25,664 WARN L202 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-02-19 17:48:25,665 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:25,685 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-02-19 17:48:25,686 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:171, output treesize:227 [2021-02-19 17:48:25,924 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-02-19 17:48:26,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:26,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2021-02-19 17:48:26,283 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:26,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:26,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-02-19 17:48:26,302 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:26,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:26,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-02-19 17:48:26,322 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:26,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:26,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-02-19 17:48:26,343 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:26,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:26,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-02-19 17:48:26,361 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:26,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:26,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:48:26,381 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:26,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:26,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:48:26,399 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:26,413 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 17:48:26,416 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:27,179 WARN L202 SmtUtils]: Spent 763.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 80 [2021-02-19 17:48:27,180 INFO L628 ElimStorePlain]: treesize reduction 239, result has 53.3 percent of original size [2021-02-19 17:48:27,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:27,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:27,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 15 [2021-02-19 17:48:27,196 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:27,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:27,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:27,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:48:27,212 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:27,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:27,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:27,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:48:27,228 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:27,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:27,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:27,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:48:27,243 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:27,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:27,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-02-19 17:48:27,257 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:27,579 WARN L202 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-02-19 17:48:27,580 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:27,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-02-19 17:48:27,592 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:27,895 WARN L202 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-02-19 17:48:27,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:27,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:48:27,907 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 2 xjuncts. [2021-02-19 17:48:28,226 WARN L202 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-02-19 17:48:28,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:28,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:28,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:28,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:48:28,242 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:28,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:28,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:48:28,255 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:28,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:28,611 WARN L202 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-02-19 17:48:28,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:28,612 INFO L518 ElimStorePlain]: Eliminatee v_prenex_770 vanished before elimination [2021-02-19 17:48:28,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:48:28,624 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 2 xjuncts. [2021-02-19 17:48:28,965 WARN L202 SmtUtils]: Spent 340.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-02-19 17:48:28,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:28,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:28,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:28,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:48:28,981 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:28,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:28,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:48:28,994 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:29,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:29,371 WARN L202 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-02-19 17:48:29,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:29,380 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-02-19 17:48:29,380 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 12 variables, input treesize:597, output treesize:135 [2021-02-19 17:48:29,693 WARN L202 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-02-19 17:48:29,875 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 15 [2021-02-19 17:48:29,915 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:29,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:29,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-02-19 17:48:29,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071316464] [2021-02-19 17:48:29,916 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:48:29,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:29,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:48:29,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:48:29,916 INFO L87 Difference]: Start difference. First operand 187 states and 551 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:30,466 WARN L202 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-02-19 17:48:30,934 WARN L202 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 45 [2021-02-19 17:48:32,259 WARN L202 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 119 DAG size of output: 106 [2021-02-19 17:48:33,614 WARN L202 SmtUtils]: Spent 991.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2021-02-19 17:48:34,784 WARN L202 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2021-02-19 17:48:35,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:35,062 INFO L93 Difference]: Finished difference Result 279 states and 801 transitions. [2021-02-19 17:48:35,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:48:35,065 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:48:35,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:35,065 INFO L225 Difference]: With dead ends: 279 [2021-02-19 17:48:35,065 INFO L226 Difference]: Without dead ends: 275 [2021-02-19 17:48:35,065 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:48:35,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-02-19 17:48:35,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 185. [2021-02-19 17:48:35,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.9510869565217392) internal successors, (543), 184 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:35,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 543 transitions. [2021-02-19 17:48:35,068 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 543 transitions. Word has length 17 [2021-02-19 17:48:35,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:35,068 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 543 transitions. [2021-02-19 17:48:35,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:35,068 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 543 transitions. [2021-02-19 17:48:35,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:48:35,068 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:35,068 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:35,268 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2783 [2021-02-19 17:48:35,269 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:35,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:35,269 INFO L82 PathProgramCache]: Analyzing trace with hash -102238875, now seen corresponding path program 76 times [2021-02-19 17:48:35,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:35,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486302595] [2021-02-19 17:48:35,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:35,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:35,425 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2021-02-19 17:48:35,765 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-02-19 17:48:35,989 WARN L202 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-02-19 17:48:36,149 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:36,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486302595] [2021-02-19 17:48:36,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794116269] [2021-02-19 17:48:36,149 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:36,169 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:48:36,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:36,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:48:36,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:36,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:36,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:36,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:48:36,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:36,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:36,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:48:36,973 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:37,191 WARN L202 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-02-19 17:48:37,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:37,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:37,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:37,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:48:37,208 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:37,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:37,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:48:37,221 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-02-19 17:48:37,458 WARN L202 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-02-19 17:48:37,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:37,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-02-19 17:48:37,476 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:190, output treesize:180 [2021-02-19 17:48:37,680 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-02-19 17:48:37,972 INFO L446 ElimStorePlain]: Different costs {1=[array_0], 36=[array_2]} [2021-02-19 17:48:37,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:37,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-02-19 17:48:37,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-02-19 17:48:37,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:37,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:48:38,003 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:38,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:38,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:48:38,019 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:38,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:38,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:48:38,034 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:38,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:38,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-02-19 17:48:38,049 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-02-19 17:48:38,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:38,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-02-19 17:48:38,065 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 4 xjuncts. [2021-02-19 17:48:38,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:38,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:48:38,082 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:38,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:38,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-02-19 17:48:38,099 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-02-19 17:48:38,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:38,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:48:38,117 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:38,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:48:38,133 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:39,241 WARN L202 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 128 DAG size of output: 84 [2021-02-19 17:48:39,242 INFO L628 ElimStorePlain]: treesize reduction 290, result has 57.0 percent of original size [2021-02-19 17:48:39,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:39,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:39,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:48:39,258 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:39,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:39,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:39,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-02-19 17:48:39,273 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:39,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:39,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:39,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:39,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:48:39,324 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:39,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:39,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:39,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-02-19 17:48:39,340 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:39,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:39,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:39,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:39,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:48:39,402 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:39,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:39,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:39,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-02-19 17:48:39,419 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:39,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:39,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:39,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 15 [2021-02-19 17:48:39,435 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:39,487 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:39,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:39,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:39,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:48:39,503 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:39,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:39,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:39,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:48:39,519 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:39,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:39,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:39,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:48:39,567 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:40,049 WARN L202 SmtUtils]: Spent 481.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-02-19 17:48:40,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:40,054 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-02-19 17:48:40,055 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 10 variables, input treesize:509, output treesize:208 [2021-02-19 17:48:40,709 WARN L202 SmtUtils]: Spent 581.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2021-02-19 17:48:41,032 WARN L202 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2021-02-19 17:48:41,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:41,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:41,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-02-19 17:48:41,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490798387] [2021-02-19 17:48:41,076 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:48:41,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:41,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:48:41,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:48:41,076 INFO L87 Difference]: Start difference. First operand 185 states and 543 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:42,008 WARN L202 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-02-19 17:48:42,724 WARN L202 SmtUtils]: Spent 552.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2021-02-19 17:48:44,858 WARN L202 SmtUtils]: Spent 1.72 s on a formula simplification. DAG size of input: 114 DAG size of output: 103 [2021-02-19 17:48:45,875 WARN L202 SmtUtils]: Spent 831.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2021-02-19 17:48:46,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:46,267 INFO L93 Difference]: Finished difference Result 269 states and 776 transitions. [2021-02-19 17:48:46,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 17:48:46,270 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:48:46,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:46,271 INFO L225 Difference]: With dead ends: 269 [2021-02-19 17:48:46,271 INFO L226 Difference]: Without dead ends: 265 [2021-02-19 17:48:46,271 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:48:46,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-02-19 17:48:46,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 183. [2021-02-19 17:48:46,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.9505494505494507) internal successors, (537), 182 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:46,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 537 transitions. [2021-02-19 17:48:46,274 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 537 transitions. Word has length 17 [2021-02-19 17:48:46,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:46,274 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 537 transitions. [2021-02-19 17:48:46,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:46,274 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 537 transitions. [2021-02-19 17:48:46,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:48:46,274 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:46,274 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:46,474 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2821,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:46,475 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:46,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:46,475 INFO L82 PathProgramCache]: Analyzing trace with hash -99613099, now seen corresponding path program 77 times [2021-02-19 17:48:46,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:46,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338312592] [2021-02-19 17:48:46,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:46,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:46,972 WARN L202 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-02-19 17:48:47,206 WARN L202 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-02-19 17:48:47,375 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:47,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338312592] [2021-02-19 17:48:47,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073391114] [2021-02-19 17:48:47,376 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:47,395 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:48:47,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:47,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:48:47,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:48:47,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:47,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:48:47,641 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 17:48:47,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:47,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:48:47,654 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:47,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:47,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:48:47,665 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:47,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:48:47,676 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:47,809 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-02-19 17:48:47,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:47,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-02-19 17:48:47,813 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:113, output treesize:103 [2021-02-19 17:48:47,998 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-02-19 17:48:48,210 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-02-19 17:48:48,284 INFO L446 ElimStorePlain]: Different costs {0=[array_2], 1=[array_0]} [2021-02-19 17:48:48,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:48:48,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:48,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-02-19 17:48:48,314 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-02-19 17:48:48,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-02-19 17:48:48,329 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-02-19 17:48:48,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:48:48,344 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:48,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:48:48,359 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:48,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:48:48,376 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-02-19 17:48:48,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:48:48,392 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:48,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:48:48,407 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:48,416 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 17:48:48,420 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:48,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-02-19 17:48:48,435 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 4 xjuncts. [2021-02-19 17:48:49,136 WARN L202 SmtUtils]: Spent 700.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 51 [2021-02-19 17:48:49,137 INFO L628 ElimStorePlain]: treesize reduction 171, result has 58.9 percent of original size [2021-02-19 17:48:49,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:49,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:48:49,149 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:49,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:49,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-02-19 17:48:49,161 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:49,196 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:49,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:49,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:48:49,209 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:49,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:49,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:48:49,222 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:49,258 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:49,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:49,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:48:49,271 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:49,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:49,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:48:49,284 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:49,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:49,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:48:49,297 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:49,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:48:49,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:48:49,310 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:49,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-02-19 17:48:49,321 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-02-19 17:48:49,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:49,647 WARN L202 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-02-19 17:48:49,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:48:49,651 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-02-19 17:48:49,652 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 2 variables, input treesize:344, output treesize:140 [2021-02-19 17:48:50,017 WARN L202 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-02-19 17:48:50,247 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 16 [2021-02-19 17:48:50,269 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:50,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:48:50,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-02-19 17:48:50,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686621898] [2021-02-19 17:48:50,269 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:48:50,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:48:50,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:48:50,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:48:50,270 INFO L87 Difference]: Start difference. First operand 183 states and 537 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:50,767 WARN L202 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2021-02-19 17:48:51,755 WARN L202 SmtUtils]: Spent 762.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-02-19 17:48:52,505 WARN L202 SmtUtils]: Spent 612.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 66 [2021-02-19 17:48:54,547 WARN L202 SmtUtils]: Spent 1.80 s on a formula simplification. DAG size of input: 95 DAG size of output: 91 [2021-02-19 17:48:56,626 WARN L202 SmtUtils]: Spent 1.87 s on a formula simplification. DAG size of input: 97 DAG size of output: 93 [2021-02-19 17:48:58,556 WARN L202 SmtUtils]: Spent 1.78 s on a formula simplification. DAG size of input: 91 DAG size of output: 87 [2021-02-19 17:48:58,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:48:58,872 INFO L93 Difference]: Finished difference Result 311 states and 883 transitions. [2021-02-19 17:48:58,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:48:58,875 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:48:58,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:48:58,876 INFO L225 Difference]: With dead ends: 311 [2021-02-19 17:48:58,876 INFO L226 Difference]: Without dead ends: 303 [2021-02-19 17:48:58,876 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:48:58,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-02-19 17:48:58,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 187. [2021-02-19 17:48:58,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.9516129032258065) internal successors, (549), 186 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:58,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 549 transitions. [2021-02-19 17:48:58,879 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 549 transitions. Word has length 17 [2021-02-19 17:48:58,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:48:58,879 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 549 transitions. [2021-02-19 17:48:58,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:48:58,879 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 549 transitions. [2021-02-19 17:48:58,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:48:58,879 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:48:58,879 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:48:59,080 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2866 [2021-02-19 17:48:59,080 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:48:59,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:48:59,080 INFO L82 PathProgramCache]: Analyzing trace with hash 61528583, now seen corresponding path program 78 times [2021-02-19 17:48:59,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:48:59,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076966321] [2021-02-19 17:48:59,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:48:59,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:48:59,366 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2021-02-19 17:48:59,730 WARN L202 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-02-19 17:48:59,891 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2021-02-19 17:48:59,951 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:48:59,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076966321] [2021-02-19 17:48:59,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668876649] [2021-02-19 17:48:59,951 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:48:59,970 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 17:48:59,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:48:59,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:48:59,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:00,273 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-02-19 17:49:00,475 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-02-19 17:49:00,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:00,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:00,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:49:00,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:00,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:00,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:00,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:49:00,793 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:00,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:00,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:49:00,809 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:01,210 WARN L202 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-02-19 17:49:01,211 INFO L628 ElimStorePlain]: treesize reduction 16, result has 88.8 percent of original size [2021-02-19 17:49:01,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:01,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:01,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:49:01,227 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:01,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:01,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:49:01,241 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:01,444 WARN L202 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2021-02-19 17:49:01,445 INFO L628 ElimStorePlain]: treesize reduction 45, result has 59.8 percent of original size [2021-02-19 17:49:01,454 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 3 xjuncts. [2021-02-19 17:49:01,454 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:164, output treesize:67 [2021-02-19 17:49:01,814 INFO L446 ElimStorePlain]: Different costs {0=[array_0, v_prenex_783, v_prenex_785], 1=[array_4, v_prenex_784, v_prenex_786]} [2021-02-19 17:49:01,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:49:01,827 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:01,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:49:01,843 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-02-19 17:49:02,274 WARN L202 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2021-02-19 17:49:02,276 INFO L628 ElimStorePlain]: treesize reduction 24, result has 85.6 percent of original size [2021-02-19 17:49:02,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-02-19 17:49:02,289 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:02,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-02-19 17:49:02,302 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:02,490 WARN L202 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-02-19 17:49:02,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:02,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:49:02,504 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:02,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:49:02,518 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:02,681 WARN L202 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-02-19 17:49:02,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:02,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:02,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:02,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:49:02,698 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:02,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:02,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:49:02,711 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:02,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:02,907 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-02-19 17:49:02,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:02,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:02,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:02,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:49:02,925 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:02,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:02,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-02-19 17:49:02,939 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:03,087 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-02-19 17:49:03,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:03,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:03,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:03,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-02-19 17:49:03,103 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:03,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:03,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:49:03,117 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:03,266 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-02-19 17:49:03,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:03,273 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-02-19 17:49:03,273 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 9 variables, input treesize:163, output treesize:31 [2021-02-19 17:49:03,453 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:03,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:03,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-02-19 17:49:03,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147585961] [2021-02-19 17:49:03,453 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:49:03,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:03,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:49:03,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:49:03,454 INFO L87 Difference]: Start difference. First operand 187 states and 549 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:04,285 WARN L202 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2021-02-19 17:49:04,769 WARN L202 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2021-02-19 17:49:05,160 WARN L202 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2021-02-19 17:49:05,454 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 13 [2021-02-19 17:49:05,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:05,632 INFO L93 Difference]: Finished difference Result 228 states and 661 transitions. [2021-02-19 17:49:05,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:49:05,637 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:49:05,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:05,638 INFO L225 Difference]: With dead ends: 228 [2021-02-19 17:49:05,638 INFO L226 Difference]: Without dead ends: 224 [2021-02-19 17:49:05,638 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:49:05,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-02-19 17:49:05,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 192. [2021-02-19 17:49:05,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.9528795811518322) internal successors, (564), 191 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:05,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 564 transitions. [2021-02-19 17:49:05,640 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 564 transitions. Word has length 17 [2021-02-19 17:49:05,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:05,641 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 564 transitions. [2021-02-19 17:49:05,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:05,641 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 564 transitions. [2021-02-19 17:49:05,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:49:05,641 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:05,641 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:05,841 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2881 [2021-02-19 17:49:05,841 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:05,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:05,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1542766453, now seen corresponding path program 79 times [2021-02-19 17:49:05,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:05,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474020744] [2021-02-19 17:49:05,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:05,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:06,324 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-02-19 17:49:06,510 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:06,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474020744] [2021-02-19 17:49:06,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983841409] [2021-02-19 17:49:06,510 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:49:06,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:06,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:49:06,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:06,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:06,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:06,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:49:06,873 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:06,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:06,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:06,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:49:06,888 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:06,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:06,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:06,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:49:06,903 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:06,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:06,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-02-19 17:49:06,917 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-02-19 17:49:07,221 WARN L202 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-02-19 17:49:07,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:07,226 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-02-19 17:49:07,226 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:177, output treesize:237 [2021-02-19 17:49:07,604 WARN L202 SmtUtils]: Spent 312.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-02-19 17:49:07,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:07,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:07,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:49:07,869 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 17:49:07,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:07,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:07,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:49:07,887 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:07,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:07,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:07,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-02-19 17:49:07,905 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:07,915 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 17:49:07,919 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:07,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:07,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:07,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 38 [2021-02-19 17:49:07,944 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:07,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:07,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:07,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 36 [2021-02-19 17:49:07,968 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:07,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:07,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:07,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:49:07,992 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:08,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:08,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:08,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-02-19 17:49:08,014 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:08,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:08,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:08,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:49:08,036 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:08,048 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 17:49:08,052 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:08,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:08,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:08,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:49:08,074 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 2 xjuncts. [2021-02-19 17:49:08,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:08,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:08,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:49:08,096 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:08,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:08,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:08,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:49:08,117 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:08,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:08,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-02-19 17:49:08,135 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:09,148 WARN L202 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2021-02-19 17:49:09,149 INFO L628 ElimStorePlain]: treesize reduction 203, result has 60.9 percent of original size [2021-02-19 17:49:09,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:09,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:09,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:49:09,167 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:09,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:09,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:09,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:49:09,185 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:09,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:09,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:09,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:09,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-02-19 17:49:09,241 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:09,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:09,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:09,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:49:09,259 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:09,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:09,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:09,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:09,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:49:09,317 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:09,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:09,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:09,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:49:09,335 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:09,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:09,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:09,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:49:09,354 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:09,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:09,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:09,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-02-19 17:49:09,373 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:09,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:09,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:49:09,388 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:09,832 WARN L202 SmtUtils]: Spent 443.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-02-19 17:49:09,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:09,838 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-02-19 17:49:09,839 INFO L247 ElimStorePlain]: Needed 24 recursive calls to eliminate 3 variables, input treesize:659, output treesize:169 [2021-02-19 17:49:10,255 WARN L202 SmtUtils]: Spent 357.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-02-19 17:49:10,503 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 16 [2021-02-19 17:49:10,527 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:10,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:10,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-02-19 17:49:10,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502464197] [2021-02-19 17:49:10,527 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:49:10,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:10,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:49:10,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:49:10,528 INFO L87 Difference]: Start difference. First operand 192 states and 564 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:11,021 WARN L202 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-02-19 17:49:11,811 WARN L202 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-02-19 17:49:11,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:11,931 INFO L93 Difference]: Finished difference Result 232 states and 663 transitions. [2021-02-19 17:49:11,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:49:11,934 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:49:11,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:11,935 INFO L225 Difference]: With dead ends: 232 [2021-02-19 17:49:11,935 INFO L226 Difference]: Without dead ends: 228 [2021-02-19 17:49:11,935 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:49:11,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-02-19 17:49:11,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 195. [2021-02-19 17:49:11,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.9690721649484537) internal successors, (576), 194 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:11,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 576 transitions. [2021-02-19 17:49:11,937 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 576 transitions. Word has length 17 [2021-02-19 17:49:11,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:11,937 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 576 transitions. [2021-02-19 17:49:11,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:11,938 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 576 transitions. [2021-02-19 17:49:11,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:49:11,938 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:11,938 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:12,139 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2920,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:49:12,139 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:12,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:12,139 INFO L82 PathProgramCache]: Analyzing trace with hash -128209563, now seen corresponding path program 80 times [2021-02-19 17:49:12,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:12,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708387425] [2021-02-19 17:49:12,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:12,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:12,455 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-02-19 17:49:12,737 WARN L202 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-02-19 17:49:12,948 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:12,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708387425] [2021-02-19 17:49:12,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356451522] [2021-02-19 17:49:12,948 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:49:12,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:49:12,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:49:12,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:49:12,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:13,356 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-02-19 17:49:13,579 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-02-19 17:49:13,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:49:13,653 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:13,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:49:13,665 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:13,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:49:13,677 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-02-19 17:49:13,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:49:13,690 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:13,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:49:13,702 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:13,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:49:13,714 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:14,012 WARN L202 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-02-19 17:49:14,013 INFO L628 ElimStorePlain]: treesize reduction 18, result has 85.8 percent of original size [2021-02-19 17:49:14,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-02-19 17:49:14,016 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:151, output treesize:109 [2021-02-19 17:49:14,236 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-02-19 17:49:14,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17 [2021-02-19 17:49:14,359 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:14,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-02-19 17:49:14,373 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:14,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:49:14,385 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:14,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:49:14,402 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:14,581 WARN L202 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 23 [2021-02-19 17:49:14,582 INFO L628 ElimStorePlain]: treesize reduction 73, result has 36.5 percent of original size [2021-02-19 17:49:14,582 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-02-19 17:49:14,583 INFO L518 ElimStorePlain]: Eliminatee v_prenex_790 vanished before elimination [2021-02-19 17:49:14,583 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-02-19 17:49:14,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:49:14,594 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:14,636 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:14,636 INFO L518 ElimStorePlain]: Eliminatee v_prenex_788 vanished before elimination [2021-02-19 17:49:14,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-02-19 17:49:14,638 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:187, output treesize:26 [2021-02-19 17:49:14,765 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:14,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:14,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-02-19 17:49:14,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549149708] [2021-02-19 17:49:14,766 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:49:14,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:14,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:49:14,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:49:14,766 INFO L87 Difference]: Start difference. First operand 195 states and 576 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:15,693 WARN L202 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-02-19 17:49:16,206 WARN L202 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 48 [2021-02-19 17:49:16,967 WARN L202 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2021-02-19 17:49:17,330 WARN L202 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-02-19 17:49:17,869 WARN L202 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 47 [2021-02-19 17:49:18,238 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 14 [2021-02-19 17:49:18,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:18,337 INFO L93 Difference]: Finished difference Result 232 states and 655 transitions. [2021-02-19 17:49:18,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:49:18,341 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:49:18,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:18,341 INFO L225 Difference]: With dead ends: 232 [2021-02-19 17:49:18,341 INFO L226 Difference]: Without dead ends: 224 [2021-02-19 17:49:18,341 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:49:18,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-02-19 17:49:18,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 189. [2021-02-19 17:49:18,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.952127659574468) internal successors, (555), 188 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:18,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 555 transitions. [2021-02-19 17:49:18,344 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 555 transitions. Word has length 17 [2021-02-19 17:49:18,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:18,344 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 555 transitions. [2021-02-19 17:49:18,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:18,344 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 555 transitions. [2021-02-19 17:49:18,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:49:18,344 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:18,344 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:18,544 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2938,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:49:18,545 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:18,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:18,545 INFO L82 PathProgramCache]: Analyzing trace with hash 2091682863, now seen corresponding path program 81 times [2021-02-19 17:49:18,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:18,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491218777] [2021-02-19 17:49:18,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:18,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:18,992 WARN L202 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2021-02-19 17:49:19,292 WARN L202 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-02-19 17:49:19,435 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 24 [2021-02-19 17:49:19,617 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:19,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491218777] [2021-02-19 17:49:19,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825939850] [2021-02-19 17:49:19,618 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:49:19,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:49:19,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:49:19,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:49:19,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:20,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:20,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:20,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:49:20,076 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:20,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:20,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:20,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:49:20,094 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:20,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:20,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:20,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:49:20,112 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:20,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:20,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-02-19 17:49:20,127 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-02-19 17:49:20,513 WARN L202 SmtUtils]: Spent 385.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-02-19 17:49:20,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:20,541 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-02-19 17:49:20,541 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:219, output treesize:275 [2021-02-19 17:49:20,800 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-02-19 17:49:21,199 WARN L202 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 60 [2021-02-19 17:49:21,936 INFO L446 ElimStorePlain]: Different costs {1=[array_0], 15=[array_4]} [2021-02-19 17:49:21,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:21,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:21,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:49:21,953 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 17:49:21,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:21,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:21,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:49:21,972 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:21,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:21,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:21,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-02-19 17:49:21,989 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:22,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:22,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:22,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:49:22,009 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-02-19 17:49:22,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:22,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:22,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:49:22,027 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:22,031 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 17:49:22,035 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:22,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:22,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:22,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:49:22,055 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:22,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:22,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:22,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:49:22,072 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:22,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:22,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-02-19 17:49:22,094 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:22,678 WARN L202 SmtUtils]: Spent 584.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 56 [2021-02-19 17:49:22,680 INFO L628 ElimStorePlain]: treesize reduction 138, result has 53.2 percent of original size [2021-02-19 17:49:22,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:22,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:22,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:49:22,697 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:22,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:22,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:22,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:49:22,715 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:22,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:22,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:22,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-02-19 17:49:22,733 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:22,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:22,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:22,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:49:22,751 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:22,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:22,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:22,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:49:22,768 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:22,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:22,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:22,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:49:22,826 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:23,051 WARN L202 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-02-19 17:49:23,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:23,061 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-02-19 17:49:23,061 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 8 variables, input treesize:348, output treesize:43 [2021-02-19 17:49:23,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:23,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:23,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-02-19 17:49:23,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860169968] [2021-02-19 17:49:23,244 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:49:23,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:23,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:49:23,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:49:23,245 INFO L87 Difference]: Start difference. First operand 189 states and 555 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:24,115 WARN L202 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2021-02-19 17:49:24,712 WARN L202 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 90 [2021-02-19 17:49:25,699 WARN L202 SmtUtils]: Spent 729.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 107 [2021-02-19 17:49:26,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:26,148 INFO L93 Difference]: Finished difference Result 218 states and 630 transitions. [2021-02-19 17:49:26,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:49:26,150 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:49:26,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:26,151 INFO L225 Difference]: With dead ends: 218 [2021-02-19 17:49:26,151 INFO L226 Difference]: Without dead ends: 214 [2021-02-19 17:49:26,151 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:49:26,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-02-19 17:49:26,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 193. [2021-02-19 17:49:26,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.9635416666666665) internal successors, (569), 192 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:26,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 569 transitions. [2021-02-19 17:49:26,153 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 569 transitions. Word has length 17 [2021-02-19 17:49:26,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:26,153 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 569 transitions. [2021-02-19 17:49:26,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:26,154 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 569 transitions. [2021-02-19 17:49:26,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:49:26,154 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:26,154 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:26,368 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2961,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:49:26,369 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:26,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:26,369 INFO L82 PathProgramCache]: Analyzing trace with hash 565773439, now seen corresponding path program 82 times [2021-02-19 17:49:26,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:26,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367734737] [2021-02-19 17:49:26,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:26,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:26,786 WARN L202 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2021-02-19 17:49:27,315 WARN L202 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2021-02-19 17:49:27,623 WARN L202 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-02-19 17:49:27,817 WARN L202 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-02-19 17:49:27,900 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:27,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367734737] [2021-02-19 17:49:27,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625513023] [2021-02-19 17:49:27,900 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:49:27,919 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:49:27,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:49:27,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:49:27,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:28,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:28,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:28,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:49:28,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:28,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:28,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:49:28,416 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:28,598 WARN L202 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-02-19 17:49:28,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:28,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:28,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:28,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:49:28,617 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:28,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:28,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:49:28,633 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-02-19 17:49:28,833 WARN L202 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-02-19 17:49:28,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:28,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-02-19 17:49:28,854 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:134, output treesize:122 [2021-02-19 17:49:29,596 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_802, array_0, v_prenex_804, v_prenex_806], 1=[v_prenex_803, v_prenex_805, v_prenex_807, array_4]} [2021-02-19 17:49:29,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:49:29,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:30,019 WARN L202 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 54 [2021-02-19 17:49:30,021 INFO L628 ElimStorePlain]: treesize reduction 150, result has 46.8 percent of original size [2021-02-19 17:49:30,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:49:30,032 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-02-19 17:49:30,203 WARN L202 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-02-19 17:49:30,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:30,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:49:30,218 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-02-19 17:49:30,446 WARN L202 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-02-19 17:49:30,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:30,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:49:30,462 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:30,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-02-19 17:49:30,475 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:30,683 WARN L202 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-02-19 17:49:30,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:30,684 INFO L518 ElimStorePlain]: Eliminatee v_prenex_803 vanished before elimination [2021-02-19 17:49:30,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:30,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:30,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:49:30,701 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:30,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:30,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:49:30,716 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:30,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:30,967 WARN L202 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-02-19 17:49:30,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:30,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:30,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:31,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-02-19 17:49:31,006 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:31,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:31,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:49:31,024 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:31,239 WARN L202 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-02-19 17:49:31,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:31,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:31,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:31,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:49:31,258 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:31,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:31,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:49:31,272 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:31,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:31,518 WARN L202 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-02-19 17:49:31,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:31,525 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-02-19 17:49:31,526 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 12 variables, input treesize:289, output treesize:52 [2021-02-19 17:49:31,704 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2021-02-19 17:49:31,765 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:31,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:31,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-02-19 17:49:31,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473775370] [2021-02-19 17:49:31,765 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:49:31,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:31,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:49:31,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:49:31,766 INFO L87 Difference]: Start difference. First operand 193 states and 569 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:32,778 WARN L202 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-02-19 17:49:33,523 WARN L202 SmtUtils]: Spent 564.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 91 [2021-02-19 17:49:34,695 WARN L202 SmtUtils]: Spent 794.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 102 [2021-02-19 17:49:35,198 WARN L202 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-02-19 17:49:35,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:35,472 INFO L93 Difference]: Finished difference Result 233 states and 671 transitions. [2021-02-19 17:49:35,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:49:35,476 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:49:35,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:35,476 INFO L225 Difference]: With dead ends: 233 [2021-02-19 17:49:35,476 INFO L226 Difference]: Without dead ends: 229 [2021-02-19 17:49:35,477 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:49:35,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-02-19 17:49:35,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 191. [2021-02-19 17:49:35,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.9526315789473685) internal successors, (561), 190 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:35,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 561 transitions. [2021-02-19 17:49:35,479 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 561 transitions. Word has length 17 [2021-02-19 17:49:35,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:35,479 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 561 transitions. [2021-02-19 17:49:35,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:35,479 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 561 transitions. [2021-02-19 17:49:35,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:49:35,479 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:35,479 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:35,689 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2982 [2021-02-19 17:49:35,690 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:35,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:35,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1276876709, now seen corresponding path program 83 times [2021-02-19 17:49:35,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:35,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344501510] [2021-02-19 17:49:35,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:35,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:36,089 WARN L202 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-02-19 17:49:36,265 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2021-02-19 17:49:36,613 WARN L202 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-02-19 17:49:36,810 WARN L202 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2021-02-19 17:49:37,032 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:37,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344501510] [2021-02-19 17:49:37,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584347381] [2021-02-19 17:49:37,033 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:49:37,054 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:49:37,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:49:37,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:49:37,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:37,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:37,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:49:37,423 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:37,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:37,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:49:37,438 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:37,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:37,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:49:37,450 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:37,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:49:37,464 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-02-19 17:49:37,680 WARN L202 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-02-19 17:49:37,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:37,685 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-02-19 17:49:37,685 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:145, output treesize:135 [2021-02-19 17:49:37,965 WARN L202 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-02-19 17:49:38,083 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_811, v_prenex_813, array_2, v_prenex_809], 1=[v_prenex_812, array_0, v_prenex_808, v_prenex_810]} [2021-02-19 17:49:38,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-02-19 17:49:38,099 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 17:49:38,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:49:38,114 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:38,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:49:38,129 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:38,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-02-19 17:49:38,145 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-02-19 17:49:39,042 WARN L202 SmtUtils]: Spent 896.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2021-02-19 17:49:39,043 INFO L628 ElimStorePlain]: treesize reduction 82, result has 78.2 percent of original size [2021-02-19 17:49:39,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:49:39,058 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:39,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:49:39,073 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-02-19 17:49:39,487 WARN L202 SmtUtils]: Spent 413.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-02-19 17:49:39,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:39,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:49:39,502 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-02-19 17:49:40,337 WARN L202 SmtUtils]: Spent 834.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2021-02-19 17:49:40,339 INFO L628 ElimStorePlain]: treesize reduction 39, result has 87.3 percent of original size [2021-02-19 17:49:40,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-02-19 17:49:40,354 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:41,106 WARN L202 SmtUtils]: Spent 751.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2021-02-19 17:49:41,108 INFO L628 ElimStorePlain]: treesize reduction 23, result has 91.2 percent of original size [2021-02-19 17:49:41,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:41,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-02-19 17:49:41,123 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:41,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:49:41,136 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:41,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:41,534 WARN L202 SmtUtils]: Spent 363.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-02-19 17:49:41,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:41,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:41,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:49:41,551 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:41,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:49:41,564 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:41,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:41,926 WARN L202 SmtUtils]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-02-19 17:49:41,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:41,927 INFO L518 ElimStorePlain]: Eliminatee v_prenex_808 vanished before elimination [2021-02-19 17:49:41,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:41,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:49:41,943 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:41,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:41,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:49:41,958 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:41,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:41,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:49:41,974 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:41,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:41,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-02-19 17:49:41,989 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:41,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:49:42,003 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:42,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:42,403 WARN L202 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-02-19 17:49:42,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:42,408 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-02-19 17:49:42,408 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 8 variables, input treesize:344, output treesize:140 [2021-02-19 17:49:42,835 WARN L202 SmtUtils]: Spent 350.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-02-19 17:49:43,099 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 16 [2021-02-19 17:49:43,125 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:43,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:43,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-02-19 17:49:43,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477574404] [2021-02-19 17:49:43,126 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:49:43,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:43,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:49:43,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:49:43,126 INFO L87 Difference]: Start difference. First operand 191 states and 561 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:44,223 WARN L202 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-02-19 17:49:45,615 WARN L202 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2021-02-19 17:49:46,585 WARN L202 SmtUtils]: Spent 880.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2021-02-19 17:49:47,708 WARN L202 SmtUtils]: Spent 864.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2021-02-19 17:49:48,639 WARN L202 SmtUtils]: Spent 762.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2021-02-19 17:49:49,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:49,012 INFO L93 Difference]: Finished difference Result 227 states and 652 transitions. [2021-02-19 17:49:49,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:49:49,016 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:49:49,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:49,017 INFO L225 Difference]: With dead ends: 227 [2021-02-19 17:49:49,017 INFO L226 Difference]: Without dead ends: 219 [2021-02-19 17:49:49,017 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:49:49,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-02-19 17:49:49,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 189. [2021-02-19 17:49:49,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.952127659574468) internal successors, (555), 188 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:49,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 555 transitions. [2021-02-19 17:49:49,019 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 555 transitions. Word has length 17 [2021-02-19 17:49:49,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:49,019 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 555 transitions. [2021-02-19 17:49:49,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:49,019 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 555 transitions. [2021-02-19 17:49:49,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:49:49,019 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:49,019 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:49,220 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3020 [2021-02-19 17:49:49,220 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:49,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:49,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1996191451, now seen corresponding path program 84 times [2021-02-19 17:49:49,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:49,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950354784] [2021-02-19 17:49:49,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:49,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:49,415 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2021-02-19 17:49:49,782 WARN L202 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-02-19 17:49:49,988 WARN L202 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2021-02-19 17:49:50,072 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:50,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950354784] [2021-02-19 17:49:50,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550249964] [2021-02-19 17:49:50,072 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:49:50,097 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:49:50,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:49:50,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:49:50,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:50,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:49:50,503 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:50,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:49:50,517 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:50,689 WARN L202 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-02-19 17:49:50,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:50,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:49:50,704 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:50,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:49:50,718 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-02-19 17:49:50,881 WARN L202 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-02-19 17:49:50,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:50,885 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-02-19 17:49:50,885 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:122, output treesize:112 [2021-02-19 17:49:51,111 WARN L202 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-02-19 17:49:51,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:51,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:51,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:49:51,952 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 17:49:51,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:51,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:49:51,970 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:52,515 WARN L202 SmtUtils]: Spent 544.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 56 [2021-02-19 17:49:52,517 INFO L628 ElimStorePlain]: treesize reduction 152, result has 48.5 percent of original size [2021-02-19 17:49:52,517 INFO L518 ElimStorePlain]: Eliminatee v_prenex_815 vanished before elimination [2021-02-19 17:49:52,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:52,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:52,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:49:52,536 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:52,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:52,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:49:52,552 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:52,741 WARN L202 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-02-19 17:49:52,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:52,743 INFO L518 ElimStorePlain]: Eliminatee v_prenex_816 vanished before elimination [2021-02-19 17:49:52,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:52,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:52,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:49:52,761 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:52,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:52,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:49:52,777 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:52,971 WARN L202 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-02-19 17:49:52,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:52,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:52,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:49:52,988 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-02-19 17:49:53,189 WARN L202 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-02-19 17:49:53,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:53,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:53,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:53,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:49:53,207 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:53,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:53,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:49:53,221 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:53,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:53,480 WARN L202 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-02-19 17:49:53,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:53,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:53,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:53,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:49:53,499 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:53,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:53,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-02-19 17:49:53,514 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:53,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:53,760 WARN L202 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-02-19 17:49:53,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:53,767 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-02-19 17:49:53,767 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 12 variables, input treesize:293, output treesize:52 [2021-02-19 17:49:53,945 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2021-02-19 17:49:53,997 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:53,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:49:53,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-02-19 17:49:53,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939993317] [2021-02-19 17:49:53,997 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:49:53,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:49:53,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:49:53,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:49:53,998 INFO L87 Difference]: Start difference. First operand 189 states and 555 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:54,920 WARN L202 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-02-19 17:49:55,556 WARN L202 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2021-02-19 17:49:56,266 WARN L202 SmtUtils]: Spent 568.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2021-02-19 17:49:56,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:49:56,600 INFO L93 Difference]: Finished difference Result 221 states and 644 transitions. [2021-02-19 17:49:56,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:49:56,604 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:49:56,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:49:56,604 INFO L225 Difference]: With dead ends: 221 [2021-02-19 17:49:56,604 INFO L226 Difference]: Without dead ends: 217 [2021-02-19 17:49:56,604 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:49:56,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-02-19 17:49:56,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 191. [2021-02-19 17:49:56,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.9526315789473685) internal successors, (561), 190 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:56,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 561 transitions. [2021-02-19 17:49:56,607 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 561 transitions. Word has length 17 [2021-02-19 17:49:56,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:49:56,607 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 561 transitions. [2021-02-19 17:49:56,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:49:56,607 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 561 transitions. [2021-02-19 17:49:56,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:49:56,607 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:49:56,607 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:49:56,808 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3041 [2021-02-19 17:49:56,808 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:49:56,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:49:56,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1653607939, now seen corresponding path program 85 times [2021-02-19 17:49:56,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:49:56,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896028925] [2021-02-19 17:49:56,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:49:56,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:57,118 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-02-19 17:49:57,405 WARN L202 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-02-19 17:49:57,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:49:57,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896028925] [2021-02-19 17:49:57,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647520879] [2021-02-19 17:49:57,596 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:49:57,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:49:57,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:49:57,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:49:57,999 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-02-19 17:49:58,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:58,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:49:58,066 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 17:49:58,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:58,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:49:58,081 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:58,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:49:58,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:49:58,095 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:58,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:49:58,109 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:58,330 WARN L202 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-02-19 17:49:58,331 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:49:58,334 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-02-19 17:49:58,335 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:137, output treesize:127 [2021-02-19 17:49:58,623 WARN L202 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-02-19 17:49:58,727 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_825, v_prenex_827, array_2, v_prenex_829], 1=[v_prenex_824, array_0, v_prenex_826, v_prenex_828]} [2021-02-19 17:49:58,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:49:58,741 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 17:49:58,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:49:58,755 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:49:59,527 WARN L202 SmtUtils]: Spent 771.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2021-02-19 17:49:59,529 INFO L628 ElimStorePlain]: treesize reduction 82, result has 76.3 percent of original size [2021-02-19 17:49:59,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-02-19 17:49:59,544 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:00,248 WARN L202 SmtUtils]: Spent 702.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-02-19 17:50:00,249 INFO L628 ElimStorePlain]: treesize reduction 23, result has 91.1 percent of original size [2021-02-19 17:50:00,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:50:00,264 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-02-19 17:50:01,029 WARN L202 SmtUtils]: Spent 765.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 57 [2021-02-19 17:50:01,031 INFO L628 ElimStorePlain]: treesize reduction 8, result has 96.7 percent of original size [2021-02-19 17:50:01,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:50:01,045 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:01,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17 [2021-02-19 17:50:01,061 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:01,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:50:01,077 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:01,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-02-19 17:50:01,093 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-02-19 17:50:01,990 WARN L202 SmtUtils]: Spent 897.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2021-02-19 17:50:01,992 INFO L628 ElimStorePlain]: treesize reduction 10, result has 96.0 percent of original size [2021-02-19 17:50:02,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:02,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-02-19 17:50:02,007 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:02,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:50:02,021 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:02,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:02,466 WARN L202 SmtUtils]: Spent 403.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-02-19 17:50:02,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:02,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:02,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:50:02,482 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:02,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:50:02,495 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:02,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:02,928 WARN L202 SmtUtils]: Spent 387.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-02-19 17:50:02,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:02,929 INFO L518 ElimStorePlain]: Eliminatee v_prenex_826 vanished before elimination [2021-02-19 17:50:02,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:02,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:50:02,945 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:02,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:02,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-02-19 17:50:02,962 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:02,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:02,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:50:02,977 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:03,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:03,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:03,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:50:03,051 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:03,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:50:03,065 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:03,438 WARN L202 SmtUtils]: Spent 371.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-02-19 17:50:03,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:03,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-02-19 17:50:03,442 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 8 variables, input treesize:344, output treesize:140 [2021-02-19 17:50:03,881 WARN L202 SmtUtils]: Spent 367.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-02-19 17:50:04,200 WARN L202 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 16 [2021-02-19 17:50:04,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:04,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:04,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-02-19 17:50:04,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826848598] [2021-02-19 17:50:04,227 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:50:04,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:04,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:50:04,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:50:04,228 INFO L87 Difference]: Start difference. First operand 191 states and 561 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:04,755 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 21 [2021-02-19 17:50:05,345 WARN L202 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2021-02-19 17:50:06,299 WARN L202 SmtUtils]: Spent 747.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-02-19 17:50:06,841 WARN L202 SmtUtils]: Spent 399.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-02-19 17:50:07,958 WARN L202 SmtUtils]: Spent 904.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2021-02-19 17:50:09,036 WARN L202 SmtUtils]: Spent 946.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2021-02-19 17:50:10,661 WARN L202 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2021-02-19 17:50:10,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:10,927 INFO L93 Difference]: Finished difference Result 227 states and 652 transitions. [2021-02-19 17:50:10,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:50:10,931 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:50:10,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:10,932 INFO L225 Difference]: With dead ends: 227 [2021-02-19 17:50:10,932 INFO L226 Difference]: Without dead ends: 219 [2021-02-19 17:50:10,932 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:50:10,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-02-19 17:50:10,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 188. [2021-02-19 17:50:10,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.9518716577540105) internal successors, (552), 187 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:10,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 552 transitions. [2021-02-19 17:50:10,935 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 552 transitions. Word has length 17 [2021-02-19 17:50:10,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:10,935 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 552 transitions. [2021-02-19 17:50:10,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:10,935 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 552 transitions. [2021-02-19 17:50:10,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:50:10,935 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:10,935 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:11,136 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3101,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:50:11,136 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:11,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:11,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1205884583, now seen corresponding path program 86 times [2021-02-19 17:50:11,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:11,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723414938] [2021-02-19 17:50:11,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:11,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:11,435 WARN L202 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2021-02-19 17:50:11,751 WARN L202 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2021-02-19 17:50:12,331 WARN L202 SmtUtils]: Spent 541.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2021-02-19 17:50:12,643 WARN L202 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2021-02-19 17:50:12,889 WARN L202 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2021-02-19 17:50:12,978 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:12,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723414938] [2021-02-19 17:50:12,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763075158] [2021-02-19 17:50:12,978 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:50:13,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:50:13,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:50:13,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:50:13,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:13,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:13,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:13,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:50:13,672 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:13,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:13,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:13,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:50:13,692 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:13,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:13,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:13,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-02-19 17:50:13,712 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-02-19 17:50:13,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:13,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:50:13,729 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:14,122 WARN L202 SmtUtils]: Spent 393.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-02-19 17:50:14,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:14,150 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-02-19 17:50:14,150 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:179, output treesize:235 [2021-02-19 17:50:14,457 WARN L202 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-02-19 17:50:15,010 WARN L202 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2021-02-19 17:50:15,913 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_836, array_0, v_prenex_838, v_prenex_840, v_prenex_842], 1=[v_prenex_837, v_prenex_839, array_4, v_prenex_841, v_prenex_843]} [2021-02-19 17:50:15,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:50:15,932 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 17:50:15,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:50:15,951 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:16,673 WARN L202 SmtUtils]: Spent 722.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 80 [2021-02-19 17:50:16,675 INFO L628 ElimStorePlain]: treesize reduction 123, result has 61.9 percent of original size [2021-02-19 17:50:16,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-02-19 17:50:16,692 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:16,940 WARN L202 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-02-19 17:50:16,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:16,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:50:16,958 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-02-19 17:50:17,254 WARN L202 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-02-19 17:50:17,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:17,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-02-19 17:50:17,269 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:17,547 WARN L202 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-02-19 17:50:17,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:17,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:50:17,565 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:17,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-02-19 17:50:17,581 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:17,855 WARN L202 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-02-19 17:50:17,857 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:17,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:17,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:17,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:50:17,877 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:17,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:17,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:50:17,894 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:17,944 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:18,224 WARN L202 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-02-19 17:50:18,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:18,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:18,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:18,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:50:18,246 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:18,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:18,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:50:18,263 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:18,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:18,600 WARN L202 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-02-19 17:50:18,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:18,601 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-02-19 17:50:18,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:18,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:50:18,619 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:18,919 WARN L202 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-02-19 17:50:18,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:18,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:18,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:18,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:50:18,939 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:18,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:18,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-02-19 17:50:18,954 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:19,221 WARN L202 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-02-19 17:50:19,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:19,231 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 10 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-02-19 17:50:19,231 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 15 variables, input treesize:319, output treesize:62 [2021-02-19 17:50:19,449 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 15 [2021-02-19 17:50:19,488 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:19,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:19,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-02-19 17:50:19,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927586244] [2021-02-19 17:50:19,489 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:50:19,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:19,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:50:19,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:50:19,489 INFO L87 Difference]: Start difference. First operand 188 states and 552 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:20,222 WARN L202 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2021-02-19 17:50:20,640 WARN L202 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-02-19 17:50:21,434 WARN L202 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-02-19 17:50:23,214 WARN L202 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 111 DAG size of output: 106 [2021-02-19 17:50:25,842 WARN L202 SmtUtils]: Spent 2.26 s on a formula simplification. DAG size of input: 140 DAG size of output: 130 [2021-02-19 17:50:26,399 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 13 [2021-02-19 17:50:26,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:26,866 INFO L93 Difference]: Finished difference Result 240 states and 698 transitions. [2021-02-19 17:50:26,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:50:26,871 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:50:26,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:26,872 INFO L225 Difference]: With dead ends: 240 [2021-02-19 17:50:26,872 INFO L226 Difference]: Without dead ends: 236 [2021-02-19 17:50:26,872 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:50:26,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-02-19 17:50:26,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 192. [2021-02-19 17:50:26,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.9528795811518322) internal successors, (564), 191 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:26,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 564 transitions. [2021-02-19 17:50:26,875 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 564 transitions. Word has length 17 [2021-02-19 17:50:26,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:26,875 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 564 transitions. [2021-02-19 17:50:26,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:26,875 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 564 transitions. [2021-02-19 17:50:26,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:50:26,875 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:26,875 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:27,081 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3121 [2021-02-19 17:50:27,082 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:27,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:27,082 INFO L82 PathProgramCache]: Analyzing trace with hash 391078429, now seen corresponding path program 87 times [2021-02-19 17:50:27,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:27,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801377896] [2021-02-19 17:50:27,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:27,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:27,419 WARN L202 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2021-02-19 17:50:27,682 WARN L202 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2021-02-19 17:50:27,832 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-02-19 17:50:28,050 WARN L202 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-02-19 17:50:28,129 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:28,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801377896] [2021-02-19 17:50:28,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724587985] [2021-02-19 17:50:28,129 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:50:28,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:50:28,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:50:28,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:50:28,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:28,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:28,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:28,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:50:28,813 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:28,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:28,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:50:28,830 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:29,103 WARN L202 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-02-19 17:50:29,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:29,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:29,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:29,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:50:29,133 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:29,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:29,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:50:29,151 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-02-19 17:50:29,457 WARN L202 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-02-19 17:50:29,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:29,481 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-02-19 17:50:29,482 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:175, output treesize:165 [2021-02-19 17:50:29,744 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-02-19 17:50:30,185 INFO L446 ElimStorePlain]: Different costs {1=[array_0], 36=[array_2]} [2021-02-19 17:50:30,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:30,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:50:30,205 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:30,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:30,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:50:30,226 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:30,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:30,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:50:30,249 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:30,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:30,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-02-19 17:50:30,270 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-02-19 17:50:30,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:30,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:50:30,290 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-02-19 17:50:30,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:30,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:50:30,312 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:30,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:30,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:50:30,334 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:30,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:30,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-02-19 17:50:30,356 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-02-19 17:50:30,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:30,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-02-19 17:50:30,379 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 2 xjuncts. [2021-02-19 17:50:30,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:50:30,399 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:32,077 WARN L202 SmtUtils]: Spent 1.68 s on a formula simplification. DAG size of input: 121 DAG size of output: 94 [2021-02-19 17:50:32,079 INFO L628 ElimStorePlain]: treesize reduction 156, result has 72.6 percent of original size [2021-02-19 17:50:32,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:32,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:32,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:50:32,108 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:32,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:32,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:32,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:50:32,137 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:32,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:32,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:32,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:50:32,165 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:32,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:32,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:32,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:32,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:50:32,252 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:32,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:32,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:32,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-02-19 17:50:32,276 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:32,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:32,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:32,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:50:32,300 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:32,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:32,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:32,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:32,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-02-19 17:50:32,386 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:32,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:32,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:32,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-02-19 17:50:32,410 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:32,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:32,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:32,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 15 [2021-02-19 17:50:32,434 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:32,517 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:32,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:32,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:32,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:50:32,542 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:32,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:32,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:50:32,577 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:32,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:33,415 WARN L202 SmtUtils]: Spent 774.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-02-19 17:50:33,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:33,422 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-02-19 17:50:33,422 INFO L247 ElimStorePlain]: Needed 22 recursive calls to eliminate 10 variables, input treesize:473, output treesize:197 [2021-02-19 17:50:34,225 WARN L202 SmtUtils]: Spent 696.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2021-02-19 17:50:34,493 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 15 [2021-02-19 17:50:34,548 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:34,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:34,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:50:34,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493292576] [2021-02-19 17:50:34,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:50:34,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:34,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:50:34,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:50:34,549 INFO L87 Difference]: Start difference. First operand 192 states and 564 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:35,373 WARN L202 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2021-02-19 17:50:35,778 WARN L202 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-02-19 17:50:36,550 WARN L202 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-02-19 17:50:37,543 WARN L202 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 81 [2021-02-19 17:50:38,421 WARN L202 SmtUtils]: Spent 749.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-02-19 17:50:38,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:38,887 INFO L93 Difference]: Finished difference Result 237 states and 690 transitions. [2021-02-19 17:50:38,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:50:38,891 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:50:38,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:38,892 INFO L225 Difference]: With dead ends: 237 [2021-02-19 17:50:38,892 INFO L226 Difference]: Without dead ends: 233 [2021-02-19 17:50:38,892 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:50:38,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-02-19 17:50:38,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 190. [2021-02-19 17:50:38,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.9523809523809526) internal successors, (558), 189 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:38,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 558 transitions. [2021-02-19 17:50:38,894 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 558 transitions. Word has length 17 [2021-02-19 17:50:38,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:38,894 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 558 transitions. [2021-02-19 17:50:38,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:38,895 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 558 transitions. [2021-02-19 17:50:38,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:50:38,895 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:38,895 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:39,095 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3150 [2021-02-19 17:50:39,095 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:39,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:39,096 INFO L82 PathProgramCache]: Analyzing trace with hash 981449527, now seen corresponding path program 88 times [2021-02-19 17:50:39,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:39,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680735635] [2021-02-19 17:50:39,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:39,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:39,445 WARN L202 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2021-02-19 17:50:39,604 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-02-19 17:50:39,812 WARN L202 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-02-19 17:50:40,031 WARN L202 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-02-19 17:50:40,125 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:40,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680735635] [2021-02-19 17:50:40,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940112878] [2021-02-19 17:50:40,125 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:50:40,145 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:50:40,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:50:40,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:50:40,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:40,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:40,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:40,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:50:40,674 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 17:50:40,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:40,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:50:40,691 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:40,935 WARN L202 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-02-19 17:50:40,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:40,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:40,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:40,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:50:40,956 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:40,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:40,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:50:40,973 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:41,218 WARN L202 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-02-19 17:50:41,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:41,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-02-19 17:50:41,244 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:143, output treesize:133 [2021-02-19 17:50:42,034 WARN L202 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2021-02-19 17:50:42,292 INFO L446 ElimStorePlain]: Different costs {1=[array_0], 10=[array_2]} [2021-02-19 17:50:42,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:42,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:50:42,313 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:42,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:42,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:50:42,333 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:42,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:42,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-02-19 17:50:42,353 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-02-19 17:50:42,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:42,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:50:42,374 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:42,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:42,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:50:42,393 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-02-19 17:50:42,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:42,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:50:42,419 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:42,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:42,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:50:42,439 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:42,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-02-19 17:50:42,456 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-02-19 17:50:43,488 WARN L202 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 87 DAG size of output: 71 [2021-02-19 17:50:43,490 INFO L628 ElimStorePlain]: treesize reduction 156, result has 63.8 percent of original size [2021-02-19 17:50:43,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:43,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:43,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:50:43,510 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:43,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:43,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:43,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:50:43,531 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:43,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:43,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:43,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:43,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:50:43,607 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:43,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:43,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:43,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:50:43,630 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:43,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:43,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:43,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:43,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:50:43,709 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:43,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:43,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:43,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-02-19 17:50:43,732 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:43,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:43,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:43,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:50:43,754 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:43,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:43,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-02-19 17:50:43,775 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:43,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:44,292 WARN L202 SmtUtils]: Spent 462.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-02-19 17:50:44,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:44,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-02-19 17:50:44,298 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 6 variables, input treesize:365, output treesize:135 [2021-02-19 17:50:45,034 WARN L202 SmtUtils]: Spent 658.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-02-19 17:50:45,281 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 15 [2021-02-19 17:50:45,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:45,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:45,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:50:45,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339859764] [2021-02-19 17:50:45,338 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:50:45,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:45,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:50:45,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:50:45,338 INFO L87 Difference]: Start difference. First operand 190 states and 558 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:46,108 WARN L202 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2021-02-19 17:50:46,515 WARN L202 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-02-19 17:50:47,225 WARN L202 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 72 [2021-02-19 17:50:47,925 WARN L202 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 76 [2021-02-19 17:50:49,402 WARN L202 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 113 DAG size of output: 105 [2021-02-19 17:50:49,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:50:49,940 INFO L93 Difference]: Finished difference Result 271 states and 783 transitions. [2021-02-19 17:50:49,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:50:49,944 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:50:49,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:50:49,945 INFO L225 Difference]: With dead ends: 271 [2021-02-19 17:50:49,945 INFO L226 Difference]: Without dead ends: 267 [2021-02-19 17:50:49,945 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:50:49,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-02-19 17:50:49,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 188. [2021-02-19 17:50:49,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.9518716577540105) internal successors, (552), 187 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:49,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 552 transitions. [2021-02-19 17:50:49,948 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 552 transitions. Word has length 17 [2021-02-19 17:50:49,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:50:49,948 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 552 transitions. [2021-02-19 17:50:49,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:49,948 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 552 transitions. [2021-02-19 17:50:49,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:50:49,948 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:50:49,948 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:50:50,155 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3182 [2021-02-19 17:50:50,155 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:50:50,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:50:50,155 INFO L82 PathProgramCache]: Analyzing trace with hash 527179285, now seen corresponding path program 89 times [2021-02-19 17:50:50,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:50:50,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752749188] [2021-02-19 17:50:50,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:50:50,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:50:50,494 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-02-19 17:50:50,711 WARN L202 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-02-19 17:50:51,017 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 17 [2021-02-19 17:50:51,116 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:51,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752749188] [2021-02-19 17:50:51,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258343762] [2021-02-19 17:50:51,117 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:50:51,137 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:50:51,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:50:51,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:50:51,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:50:51,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:51,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:51,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:50:51,775 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:51,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:51,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:51,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:50:51,796 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-02-19 17:50:51,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:51,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:51,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:50:51,817 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:51,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:51,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:50:51,835 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:52,207 WARN L202 SmtUtils]: Spent 371.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-02-19 17:50:52,208 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:52,233 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-02-19 17:50:52,233 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:213, output treesize:203 [2021-02-19 17:50:52,613 WARN L202 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-02-19 17:50:53,186 WARN L202 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2021-02-19 17:50:54,384 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_867, array_2], 15=[array_4], 21=[v_prenex_868]} [2021-02-19 17:50:54,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:54,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:54,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:50:54,405 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:54,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:54,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:54,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:50:54,427 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:54,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:54,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:54,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:50:54,450 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:54,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:54,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:54,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:50:54,474 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:54,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:54,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:54,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:50:54,497 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:54,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:54,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:50:54,517 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:55,414 WARN L202 SmtUtils]: Spent 896.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 94 [2021-02-19 17:50:55,415 INFO L628 ElimStorePlain]: treesize reduction 83, result has 77.3 percent of original size [2021-02-19 17:50:55,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:55,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:55,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:50:55,436 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-02-19 17:50:55,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:55,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:55,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:50:55,456 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-02-19 17:50:55,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:55,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:55,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-02-19 17:50:55,479 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 2 xjuncts. [2021-02-19 17:50:55,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:55,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-02-19 17:50:55,499 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 2 xjuncts. [2021-02-19 17:50:56,072 WARN L202 SmtUtils]: Spent 571.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-02-19 17:50:56,073 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:56,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:56,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:56,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-02-19 17:50:56,094 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:56,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:56,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:56,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 15 [2021-02-19 17:50:56,114 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:56,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:56,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:56,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:56,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-02-19 17:50:56,219 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:56,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:56,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:56,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:50:56,241 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:56,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:56,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:56,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:56,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:50:56,312 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:56,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:56,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:56,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:50:56,334 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:56,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:56,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:56,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:56,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:50:56,404 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:56,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:56,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-02-19 17:50:56,422 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:56,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:57,016 WARN L202 SmtUtils]: Spent 545.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-02-19 17:50:57,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:57,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:57,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:57,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-02-19 17:50:57,040 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:57,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:57,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:57,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:50:57,063 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:57,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:50:57,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:50:57,082 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-02-19 17:50:57,611 WARN L202 SmtUtils]: Spent 528.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-02-19 17:50:57,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:50:57,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 13 dim-0 vars, 4 dim-1 vars, End of recursive call: and 12 xjuncts. [2021-02-19 17:50:57,627 INFO L247 ElimStorePlain]: Needed 22 recursive calls to eliminate 17 variables, input treesize:407, output treesize:127 [2021-02-19 17:50:57,927 WARN L202 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 19 [2021-02-19 17:50:57,986 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:50:57,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:50:57,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-02-19 17:50:57,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932463236] [2021-02-19 17:50:57,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:50:57,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:50:57,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:50:57,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:50:57,987 INFO L87 Difference]: Start difference. First operand 188 states and 552 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:50:58,763 WARN L202 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-02-19 17:50:59,278 WARN L202 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-02-19 17:51:00,296 WARN L202 SmtUtils]: Spent 680.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 83 [2021-02-19 17:51:02,397 WARN L202 SmtUtils]: Spent 1.77 s on a formula simplification. DAG size of input: 149 DAG size of output: 119 [2021-02-19 17:51:03,021 WARN L202 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-02-19 17:51:03,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:51:03,321 INFO L93 Difference]: Finished difference Result 232 states and 673 transitions. [2021-02-19 17:51:03,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:51:03,326 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:51:03,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:51:03,326 INFO L225 Difference]: With dead ends: 232 [2021-02-19 17:51:03,326 INFO L226 Difference]: Without dead ends: 228 [2021-02-19 17:51:03,327 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:51:03,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-02-19 17:51:03,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 194. [2021-02-19 17:51:03,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.9637305699481864) internal successors, (572), 193 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:51:03,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 572 transitions. [2021-02-19 17:51:03,329 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 572 transitions. Word has length 17 [2021-02-19 17:51:03,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:51:03,329 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 572 transitions. [2021-02-19 17:51:03,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:51:03,329 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 572 transitions. [2021-02-19 17:51:03,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:51:03,329 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:51:03,329 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:51:03,544 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3203,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:51:03,544 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:51:03,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:51:03,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1942848177, now seen corresponding path program 90 times [2021-02-19 17:51:03,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:51:03,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7616438] [2021-02-19 17:51:03,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:51:03,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:51:03,781 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-02-19 17:51:03,915 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-02-19 17:51:04,236 WARN L202 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-02-19 17:51:04,375 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2021-02-19 17:51:04,462 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:04,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7616438] [2021-02-19 17:51:04,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381752278] [2021-02-19 17:51:04,462 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:51:04,482 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:51:04,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:51:04,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:51:04,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:51:04,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:51:04,955 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:04,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:51:04,968 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-02-19 17:51:05,177 WARN L202 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-02-19 17:51:05,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:05,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:51:05,194 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:05,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:51:05,209 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:05,393 WARN L202 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-02-19 17:51:05,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:05,398 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-02-19 17:51:05,398 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:123, output treesize:113 [2021-02-19 17:51:05,650 WARN L202 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-02-19 17:51:06,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:06,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:06,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:51:06,558 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 17:51:06,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:06,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:51:06,574 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:07,345 WARN L202 SmtUtils]: Spent 770.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 69 [2021-02-19 17:51:07,347 INFO L628 ElimStorePlain]: treesize reduction 93, result has 71.0 percent of original size [2021-02-19 17:51:07,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:07,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:07,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:51:07,368 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:07,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:07,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:51:07,386 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:07,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:07,782 WARN L202 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-02-19 17:51:07,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:07,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:07,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:07,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:51:07,803 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:07,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:07,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:07,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-02-19 17:51:07,822 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:07,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:07,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:07,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-02-19 17:51:07,842 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:07,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:07,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:51:07,859 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:08,124 WARN L202 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-02-19 17:51:08,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:08,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:08,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:08,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-02-19 17:51:08,144 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:08,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:08,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:08,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:51:08,163 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:08,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:08,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:08,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:51:08,181 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:08,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:08,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:51:08,197 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:08,491 WARN L202 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-02-19 17:51:08,492 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:08,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:08,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:51:08,510 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 2 xjuncts. [2021-02-19 17:51:08,863 WARN L202 SmtUtils]: Spent 352.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-02-19 17:51:08,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:08,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:08,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:08,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-02-19 17:51:08,885 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:08,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:08,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:51:08,902 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:08,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:09,288 WARN L202 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-02-19 17:51:09,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:09,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-02-19 17:51:09,305 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:09,576 WARN L202 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-02-19 17:51:09,577 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:09,577 INFO L518 ElimStorePlain]: Eliminatee v_prenex_875 vanished before elimination [2021-02-19 17:51:09,584 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-02-19 17:51:09,584 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 12 variables, input treesize:317, output treesize:72 [2021-02-19 17:51:09,798 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2021-02-19 17:51:09,877 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:09,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:51:09,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-02-19 17:51:09,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038123734] [2021-02-19 17:51:09,877 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:51:09,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:51:09,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:51:09,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:51:09,877 INFO L87 Difference]: Start difference. First operand 194 states and 572 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:51:10,478 WARN L202 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-02-19 17:51:10,759 WARN L202 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 28 [2021-02-19 17:51:11,199 WARN L202 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 35 [2021-02-19 17:51:12,040 WARN L202 SmtUtils]: Spent 638.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2021-02-19 17:51:12,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:51:12,421 INFO L93 Difference]: Finished difference Result 244 states and 709 transitions. [2021-02-19 17:51:12,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:51:12,425 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:51:12,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:51:12,425 INFO L225 Difference]: With dead ends: 244 [2021-02-19 17:51:12,425 INFO L226 Difference]: Without dead ends: 240 [2021-02-19 17:51:12,426 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:51:12,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-02-19 17:51:12,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 192. [2021-02-19 17:51:12,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.9528795811518322) internal successors, (564), 191 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:51:12,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 564 transitions. [2021-02-19 17:51:12,428 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 564 transitions. Word has length 17 [2021-02-19 17:51:12,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:51:12,428 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 564 transitions. [2021-02-19 17:51:12,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:51:12,428 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 564 transitions. [2021-02-19 17:51:12,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:51:12,428 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:51:12,428 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:51:12,629 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3234,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:51:12,630 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:51:12,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:51:12,630 INFO L82 PathProgramCache]: Analyzing trace with hash 869762797, now seen corresponding path program 91 times [2021-02-19 17:51:12,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:51:12,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423125483] [2021-02-19 17:51:12,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:51:12,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:51:12,866 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-02-19 17:51:13,028 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-02-19 17:51:13,293 WARN L202 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-02-19 17:51:13,504 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:13,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423125483] [2021-02-19 17:51:13,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290689948] [2021-02-19 17:51:13,504 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:51:13,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:51:13,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:51:13,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:51:13,968 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-02-19 17:51:14,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:14,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:51:14,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-02-19 17:51:14,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:14,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:51:14,042 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:14,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:14,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:51:14,054 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:14,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:51:14,068 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:14,289 WARN L202 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-02-19 17:51:14,290 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:14,293 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-02-19 17:51:14,293 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:137, output treesize:127 [2021-02-19 17:51:14,572 WARN L202 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-02-19 17:51:14,685 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_888, array_2, v_prenex_884, v_prenex_886], 1=[array_0, v_prenex_883, v_prenex_885, v_prenex_887]} [2021-02-19 17:51:14,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:51:14,700 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:14,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-02-19 17:51:14,715 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-02-19 17:51:14,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:51:14,730 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:14,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-02-19 17:51:14,745 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-02-19 17:51:15,643 WARN L202 SmtUtils]: Spent 897.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2021-02-19 17:51:15,644 INFO L628 ElimStorePlain]: treesize reduction 82, result has 78.2 percent of original size [2021-02-19 17:51:15,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:51:15,659 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-02-19 17:51:16,555 WARN L202 SmtUtils]: Spent 896.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2021-02-19 17:51:16,557 INFO L628 ElimStorePlain]: treesize reduction 39, result has 87.3 percent of original size [2021-02-19 17:51:16,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:51:16,571 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-02-19 17:51:16,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-02-19 17:51:16,586 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:17,004 WARN L202 SmtUtils]: Spent 417.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-02-19 17:51:17,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:17,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-02-19 17:51:17,030 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:17,759 WARN L202 SmtUtils]: Spent 728.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2021-02-19 17:51:17,760 INFO L628 ElimStorePlain]: treesize reduction 23, result has 91.2 percent of original size [2021-02-19 17:51:17,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:17,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:51:17,776 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:17,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:51:17,791 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:17,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:18,201 WARN L202 SmtUtils]: Spent 365.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-02-19 17:51:18,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:18,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:18,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-02-19 17:51:18,218 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:18,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-02-19 17:51:18,232 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:18,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:18,633 WARN L202 SmtUtils]: Spent 366.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-02-19 17:51:18,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:18,635 INFO L518 ElimStorePlain]: Eliminatee v_prenex_885 vanished before elimination [2021-02-19 17:51:18,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:18,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-02-19 17:51:18,650 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:18,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:18,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-02-19 17:51:18,665 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:18,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:18,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:51:18,681 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:18,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:18,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-02-19 17:51:18,696 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:18,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-02-19 17:51:18,709 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:18,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:19,123 WARN L202 SmtUtils]: Spent 356.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-02-19 17:51:19,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:19,127 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-02-19 17:51:19,127 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 8 variables, input treesize:344, output treesize:140 [2021-02-19 17:51:19,537 WARN L202 SmtUtils]: Spent 349.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-02-19 17:51:19,808 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 16 [2021-02-19 17:51:19,834 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:19,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:51:19,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-02-19 17:51:19,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409646442] [2021-02-19 17:51:19,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:51:19,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:51:19,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:51:19,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:51:19,835 INFO L87 Difference]: Start difference. First operand 192 states and 564 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:51:20,421 WARN L202 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-02-19 17:51:20,803 WARN L202 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2021-02-19 17:51:21,340 WARN L202 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2021-02-19 17:51:22,236 WARN L202 SmtUtils]: Spent 643.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2021-02-19 17:51:22,828 WARN L202 SmtUtils]: Spent 431.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-02-19 17:51:23,876 WARN L202 SmtUtils]: Spent 795.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2021-02-19 17:51:24,904 WARN L202 SmtUtils]: Spent 974.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2021-02-19 17:51:26,345 WARN L202 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-02-19 17:51:26,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:51:26,535 INFO L93 Difference]: Finished difference Result 259 states and 724 transitions. [2021-02-19 17:51:26,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:51:26,538 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:51:26,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:51:26,539 INFO L225 Difference]: With dead ends: 259 [2021-02-19 17:51:26,539 INFO L226 Difference]: Without dead ends: 247 [2021-02-19 17:51:26,539 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:51:26,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-02-19 17:51:26,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 195. [2021-02-19 17:51:26,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.963917525773196) internal successors, (575), 194 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:51:26,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 575 transitions. [2021-02-19 17:51:26,541 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 575 transitions. Word has length 17 [2021-02-19 17:51:26,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:51:26,541 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 575 transitions. [2021-02-19 17:51:26,541 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:51:26,541 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 575 transitions. [2021-02-19 17:51:26,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:51:26,542 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:51:26,542 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:51:26,742 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3295 [2021-02-19 17:51:26,742 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:51:26,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:51:26,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1453491145, now seen corresponding path program 92 times [2021-02-19 17:51:26,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:51:26,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074003137] [2021-02-19 17:51:26,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:51:26,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:51:26,935 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-02-19 17:51:27,100 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2021-02-19 17:51:27,333 WARN L202 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-02-19 17:51:27,797 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:51:27,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074003137] [2021-02-19 17:51:27,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402460642] [2021-02-19 17:51:27,798 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:51:27,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:51:27,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:51:27,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:51:27,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:51:28,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:28,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:28,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:51:28,452 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:28,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:28,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:51:28,469 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:28,770 WARN L202 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-02-19 17:51:28,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:28,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:28,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:28,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-02-19 17:51:28,790 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-02-19 17:51:28,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:28,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:51:28,806 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:29,088 WARN L202 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-02-19 17:51:29,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:51:29,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-02-19 17:51:29,111 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:188, output treesize:178 [2021-02-19 17:51:29,411 WARN L202 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-02-19 17:51:30,208 INFO L446 ElimStorePlain]: Different costs {1=[array_0], 36=[array_2]} [2021-02-19 17:51:30,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:30,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:51:30,227 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:30,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:30,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-02-19 17:51:30,245 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-02-19 17:51:30,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:30,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-02-19 17:51:30,263 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-02-19 17:51:30,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:30,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:51:30,281 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:30,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:30,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-02-19 17:51:30,298 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:30,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:30,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-02-19 17:51:30,316 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-02-19 17:51:30,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:30,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-02-19 17:51:30,334 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 4 xjuncts. [2021-02-19 17:51:30,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:30,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 17:51:30,353 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:30,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:51:30,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-02-19 17:51:30,371 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 17:51:30,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-02-19 17:51:30,388 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. Received shutdown request... [2021-02-19 17:51:31,720 WARN L219 SmtUtils]: Removed 12 from assertion stack [2021-02-19 17:51:31,920 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3315 [2021-02-19 17:51:31,921 WARN L545 AbstractCegarLoop]: Verification canceled [2021-02-19 17:51:31,924 WARN L224 ceAbstractionStarter]: Timeout [2021-02-19 17:51:31,924 INFO L202 PluginConnector]: Adding new model array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.02 05:51:31 BasicIcfg [2021-02-19 17:51:31,924 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-19 17:51:31,924 INFO L168 Benchmark]: Toolchain (without parser) took 552098.61 ms. Allocated memory was 358.6 MB in the beginning and 432.0 MB in the end (delta: 73.4 MB). Free memory was 338.9 MB in the beginning and 227.0 MB in the end (delta: 111.9 MB). Peak memory consumption was 188.0 MB. Max. memory is 16.0 GB. [2021-02-19 17:51:31,924 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 358.6 MB. Free memory was 340.2 MB in the beginning and 340.1 MB in the end (delta: 75.1 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 17:51:31,924 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.83 ms. Allocated memory is still 358.6 MB. Free memory was 338.4 MB in the beginning and 337.0 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 17:51:31,924 INFO L168 Benchmark]: Boogie Preprocessor took 24.09 ms. Allocated memory is still 358.6 MB. Free memory was 337.0 MB in the beginning and 335.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-02-19 17:51:31,924 INFO L168 Benchmark]: RCFGBuilder took 311.84 ms. Allocated memory is still 358.6 MB. Free memory was 335.9 MB in the beginning and 340.1 MB in the end (delta: -4.3 MB). Peak memory consumption was 21.4 MB. Max. memory is 16.0 GB. [2021-02-19 17:51:31,924 INFO L168 Benchmark]: TraceAbstraction took 551735.87 ms. Allocated memory was 358.6 MB in the beginning and 432.0 MB in the end (delta: 73.4 MB). Free memory was 340.1 MB in the beginning and 227.0 MB in the end (delta: 113.1 MB). Peak memory consumption was 185.5 MB. Max. memory is 16.0 GB. [2021-02-19 17:51:31,925 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 0.10 ms. Allocated memory is still 358.6 MB. Free memory was 340.2 MB in the beginning and 340.1 MB in the end (delta: 75.1 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 20.83 ms. Allocated memory is still 358.6 MB. Free memory was 338.4 MB in the beginning and 337.0 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 24.09 ms. Allocated memory is still 358.6 MB. Free memory was 337.0 MB in the beginning and 335.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 311.84 ms. Allocated memory is still 358.6 MB. Free memory was 335.9 MB in the beginning and 340.1 MB in the end (delta: -4.3 MB). Peak memory consumption was 21.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 551735.87 ms. Allocated memory was 358.6 MB in the beginning and 432.0 MB in the end (delta: 73.4 MB). Free memory was 340.1 MB in the beginning and 227.0 MB in the end (delta: 113.1 MB). Peak memory consumption was 185.5 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 91]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 91). Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,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 127 for 1329ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 551.6s, OverallIterations: 139, TraceHistogramMax: 1, AutomataDifference: 227.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3568 SDtfs, 8055 SDslu, 18601 SDs, 0 SdLazy, 47865 SolverSat, 789 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 37.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4144 GetRequests, 1565 SyntacticMatches, 248 SemanticMatches, 2331 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5756 ImplicationChecksByTransitivity, 259.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=195occurred in iteration=126, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 138 MinimizatonAttempts, 7920 StatesRemovedByMinimization, 138 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 287.3s InterpolantComputationTime, 4416 NumberOfCodeBlocks, 4416 NumberOfCodeBlocksAsserted, 380 NumberOfCheckSat, 4146 ConstructedInterpolants, 315 QuantifiedInterpolants, 2040556 SizeOfPredicates, 1411 NumberOfNonLiveVariables, 8880 ConjunctsInSsa, 2455 ConjunctsInUnsatCore, 270 InterpolantComputations, 6 PerfectInterpolantSequences, 8/636 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